Who re-introduces Democritus' theory of atoms back into modern science in the 1800's?
A. John Dalton
B. Neils Bohr
C. James Chadwick
D. J.J. Thompson
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Answers
Answer:
John Dalton
Explanation:
John Dalton re-introduces Democritus' theory of atoms back into a modern science in the 1800s. Hence, option A is correct.
What are atoms?An atom contains a central nucleus surrounded by one or more electrons.
Democritus, a Greek philosopher, and scientist in 440 B. C. proposed the theory of the atom. Democritus made his theory of atoms depend on the work of previous philosophers according to different scientists.
His explanation of the atom begins with a stone cut in half and gives two halves. If the stone is again and again continuously cut, at some point the stone becomes so small that it could no longer be cut, that atoms present separately from each other.
Hence, John Dalton re-introduces Democritus' theory of atoms back into modern science in the 1800s.
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Related Questions
I need help asap pleasee
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What information does the periodic table give you?
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The periodic table contains information about each of the known elements. It includes the name of each element, its atomic number, its atomic mass and its chemical symbol.
The periodic table is divided using groups (columns) and periods (rows).
Each specific group or period has a specific pattern in the elements.
The modern periodic table is arranged in order of increasing atomic number.
I’m not really sure what information what you were asking for but I hope this helps..
The modern periodic table was created by Dmitri Mendeleev with the main goal of showing rows and columns with a logic arrangement of chemical elements.
In each column, the groups, the elements have the same number of electrons in the outermost shells. While the rows are called periods or series.
2 QUESTIONS: ANSWER THIS with a proper answer plz. PLZ DO NOT ANSWER JUST FOR MY BRAINLY POINTS!!!!
15. For elements 1-36, there are two exceptions to the filling order as predicted from the periodic table. Draw the atomic orbital diagrams for the two exceptions and indicate how many unpaired electrons are present.
16. The elements Si, Ga, As, Ge, Al, Cd, S, and Se are all used in the manufacture of various semiconductor devices. Write the expected electron configuration for these atoms.
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Answer:
Si hay algo que sucedió entre ustedes raro o un comportamiento que tuviste con esa persona o que te vio hacer asi como le pudieron decir algo de ti que no le gustara a tu amigo hace que se comporte raro contigo
Explanation:
In an electrical wire, if instead of copper, plastic wire is used. Would it conduct electricity?Justify your answer.
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Answer:
No, a plastic wire would not conduct electricity. This is because plastic is an insulator that does not allow electric current to flow through it. In a wire, electrical conductivity is provided by the movement of charged particles - typically, electrons. Copper is an excellent conductor of electricity because it has a high number of free electrons that are not bound to atoms and can move through the wire very easily. However, in a plastic wire, the tightly bound electrons of its atoms do not allow for the free flow of charges, thus preventing the passage of electric current.
What is the series of energy transfers shown in the picture below?
A) chemical to mechanical to electrical to thermal
B) mechanical to chemical to thermal to electrical
C) electrical to thermal to mechanical to chemical
D) thermal to mechanical to electrical to chemical
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Answer:
The correct answer is A.
What does the following chemical equation illustrate concerning the relationship between elements and compounds? Na2 + 2Cl 2NaCl
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Answer:
u dont need the answer anymore bc it been haer for a long time now
Explanation:
Write a three paragraph essay about being a scientist. Include the following: If you could be any kind of scientist, what kind would you be? Why? Describe what your life would be like as the scientist you imagine.
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Answer:
the answer is a hope this hep;slms
Explanation:
betuase im write
Answer:
If I were to be a scientist, I'd be a botanist. A botanist is a scientist who studies plants. For example, they study many different aspects like their genetic, physical structure, and the distribution. They also study the relationship between plants and their different environments.
I would choose to be a botanist, because they help save our plants which are very important. They also help with telling others what exactly causes pollution and possible ways to stop it. Botanist also help with providing human resources like food. Without botanist, we would have a lot less of resources that we use in everyday life.
I can see my life as a botanist in many different ways. I might be put in the chemical based section or I might be put in the analysis of plants. Overall if I were to see myself as any kind of scientist, It would have to be a botanist.
Explanation:
Hope it helps, feel free edit whatever you'd like too
HELP! DUE NEXT PERIOD!
A puddle of water that Kim observed on the way home from school had frozen by the next morning. what caused this change?
A. Energy was removed from the water molecules
B. Attractions between the water molecules decreased
C. The volume of the water was reduced
D. The water has undergone a chemical reaction
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Answer: A
Explanation: the energy in the water has faded and then with the removal of energy often comes a state change
The Law of Conservation of Energy states...
A) energy cannot be created, but it can be destroyed and change forms
B) energy cannot be created, destroyed, or change forms
C) energy cannot be created or destroyed, but it can change forms
D) energy can be created, destroyed, and can change forms
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Answer:
C) energy cannot be created or destroyed, but it can change forms
Explanation:
I just need help all I need is the answer please some one
Answers
Answer: The correct fill-in-the-blank answers are:
1. through binary fission (already filled in)
2. be resistant to penicillin
3. through asexual reproduction.
4. cell replicates before
5. a simpler process
Explanation:
The correct fill-in-the-blank answers are:
1. Bacteria reproduce through binary fission (already filled in)
2. A parent bacterial cell is able to survive in the presence of antibiotic penicillin. Subsequent generations from this parent will be resistant to penicillin
3. Something that potatoes and bacteria have in common is that they both reproduce through asexual reproduction.
4. In asexual reproduction DNA from the parent cell replicates before it produces daughter cells.
5. Asexual reproduction is a simpler process than sexual reproduction.
Know more about Bacteria: https://brainly.com/question/6941760
A limit that defines the edges of a system and the divisions within a system *
A. constraint
B. criteria
C. prototype
D. prototype
Which one is right?
HELP PLS HELP ME
Answers
Answer:
A: Constraint
Explanation:
A: Constraint means a limitation or restriction.
B: Criteria means a principle or standard by which something may be judged or decided.
C: Prototype means a first, typical or preliminary model of something, especially a machine, from which other forms are developed or copied.
The corn crop in an area is prone to infestation by larvae from moths that feed on the cornstalks and ears of corn. The techniques used by two farmers to protect the corn crop are described below.
Technique A: Sprayed his corn crop with an insecticide. The insecticide is known to kill all honeybee, butterfly, and moth larvae.
Technique B: Used a genetically modified variety of corn. The plant produces an insecticide which selectively kills only the moth larvae as it feeds on the corn.
Which technique is likely to have less of an impact on the environment?
Technique B because it may help humans who consume corn to fight bacteria
Technique A because it kills a broader variety of insects to protect the corn
Technique B because it preserves the harmless insects and targets only the moth larvae
Technique A because insecticide use is better for preserving the environment.
Answers
Answer:
Its C
Explanation:
Method A puts a type of spray that kills bees plus butterfly's which would make their population decrease. Which isnt helpful and harms the enviroment a lot. Answer A dosent make sense it may be harmful
Answer: c
Explanation:
I took the quiz
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
Explanation:
Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.
———————————
(1/12)th Mass of one C12 atom
The subatomic particles found in the nucleus are
A.nucleus
B.molecules
C.neutrons
D.electrons
E.protons
Answers
Answer:
the correct answer is c "protons"
Explanation:
A student wanted to test how the mass of a paper airplane affected the distance it would fly. Paper clips were added before each test flight. As each paper clip was added, the plane was tested to determine how far it would fly.
What was the dependent (outcome) variable from this experiment?
The paper airplane design.
The number of paperclips.
The type of paper.
The distance the plane flies.
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Answer:
The distance the plane flies.
Explanation:
This is the dependent (outcome) variable because it is changing depending on the number of paper clips that are added to the plane.
Answer:
The distance the plane flies.
Explanation:
what does pure substance mean
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A chemical substance is a particular class of homogeneous matter whose composition is fixed and chemically defined and is made up of the following entities: molecules, form units, and atoms.
Answer:
something that contains only one kind of matter
Explanation:
The two insulated beakers shown contain equal amounts of identical liquids. The temperature of Beaker A is 85°C. The temperature of Beaker B is 40°C. A metal rod connects the beakers. Five minutes later, the temperature of Beaker A is 75°C and the temperature of Beaker B is 50°C. What might the temperatures be after another five minutes have passed?
Answers
Temp. of Beaker A = 68°C, Temp. of Beaker B = 57°C
I think this is right srry if its not :]
Please help, I don't get what does this means
3. Name the compound sodium makes with the following elements.
(a) Calcium carbonate:
Answers
Answer: hydrogen-carbonate.
Explanation:Because when carbon dioxide is passed in excess it leads to a formation of hydrogen-carbonate.
I hope everyone finds this helpful
What do people have to do to make the energy resources usable for us to power our machines and electronics?
Answers
Answer:
We divide our energy use among four economic sectors: residential, commercial, transportation, and industrial. Heating and cooling our homes, lighting office buildings, driving cars and moving freight, and manufacturing the products we rely on in our daily lives are all functions that require energy.
Explanation:
Hope this helps :\
A renewable resource is a substance of economic value which can be replenished or replaced either through natural recurring processes or biological reproduction.
This happens due to the renewable energy. Now let us understand the renewable energy are those energy that can be used again and again and it re-new after a short period of time. it is generally defined as that kind of energy resources that can be renewed naturally.
Renewable sources of energy can replace conventional sources of energy which produce harmful gasses which is harmful as well as costly.
We divide this energy in few sectors like: residential, commercial, transportation, and industrial. People use these resources for many different things which are used daily.
One of the major resource is the UV rays and people use it to produce the electricity. Many of such resources are also used in different chores like cooking, driving vehicles, etc.
Example: biomass is a biological material taken from plants or plant-based materials.
Biomass is considered a renewable resource because plants and plant-based materials can be found everywhere and once used these plants will continue to grow and supply the demand for biomass consumption.
Therefore, these resources are the most useful resources which can be renewed easily and thus used in different ways.
To know more about the renewable resources, refer: https://brainly.com/question/27570414
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THIS NEEDS TO BE FILLED OUT
Answers
Answer:
1.) Coefficient; 3
Subscript to Mg; None (1)
Subscript to Cl; 2
2.) Coefficient; none (1)
Subscript to V; 2
Subscript to O; 5
3.) Coefficient; 4
Subscript to K; 2
Subscript to C; None (1)
Subscript to O; 3
3.) Coefficient; None (1)
Subscript to Na; None (1)
Subscript to C; 2
Subscript to H; 3
Subscript to O; 2
Explanation:
The coefficient is the first big number and the subscript is the smaller number after the element.
i need help pleaseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee
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help me with these questions pls thanks :)
Answers
Answer:
1. 2 valence electrons 2. 1 valence electron
Explanation:
valence shell is the elctrons present on the outer most shell
2. 1 valence electron
3. 8 valence electrons
Valence electrons are the ones on the very outside ring. Hope this helps!
describe the role of oceans in the water cycle?
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Answer: The ocean plays a key role in this vital cycle of water. The ocean holds 97% of the total water on the planet; 78% of global precipitation occurs over the ocean, and it is the source of 86% of global evaporation. ... Water evaporates from the surface of the ocean, mostly in warm, cloud-free subtropical seas.
Explanation:
Hope this helps!
Those are some of the thing I can just think of from my aice marine class I’m sure there’s more I hope this helps.
What is your carbon footprint?
A: the amount of carbon dioxide you use when recycling
B: the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
C: the amount of carbon dioxide and oxygen in the atmosphere at any given time
D: the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuels
Answers
Answer:
D
Explanation:
According to WHO, a carbon footprint is a measure of the impact your activities have on the amount of carbon dioxide (CO2) produced through the burning of fossil fuels and is expressed as a weight of CO2 emissions produced in tonnes.
A small gap is left between the rails in the railway track. Analyze the reason.
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Answer:
There could be several possible reasons for a small gap between rails on a railway track, such as:
1. Expansion joints: Railways are designed to allow the tracks to expand and contract with changes in temperature. To accommodate this expansion, small gaps are left between the rail ends and filled with expansion joints or plates.
2. Wear and tear: Over time, the rails may experience wear and tear due to heavy loads, weather conditions, and other factors. As a result, small gaps can appear between the rails.
3. Maintenance: During maintenance activities, rail tracks may be adjusted or replaced, which could lead to small gaps between the rails.
4. Environmental factors: Environmental factors such as soil shifts, earthquakes or other natural disasters can also affect the alignment of the rails, leading to small gaps.
These are some of the possible reasons for a small gap between the rails on a railway track.
Answer:
The small gap left between the rails in a railway track is intentional and serves a specific purpose. This gap is known as the rail joint, and it allows for the expansion and contraction of the rails due to changes in temperature. When the temperature changes, the metal rails will expand or contract, and if they were joined together tightly, they could buckle or become deformed, which could be dangerous for trains passing over them. The rail joint allows the rails to move slightly and prevent damage to the track.
Additionally, the rail joint also allows for maintenance and repairs of the track. If there were no gap between the rails, it would be challenging to replace a damaged rail or perform routine maintenance, such as tightening bolts or lubricating joints. With the rail joint, maintenance personnel can easily access and work on the track.
Overall, the small gap left between the rails in a railway track is intentional and serves a crucial function in ensuring the safety and reliability of the track.
Ms. Hu was teaching her students about Earth days and Earth years. She set up this model. How should Ms. Hu move the parts of her model to illustrate an Earth day? Describe what an Earth day is in terms of the movement of the Earth/Sun.
(Earth Science)
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Explanation:
Earth spins around its axis, just as a top spins around its spindle. This spinning movement is called Earth's rotation. At the same time that the Earth spins on its axis, it also orbits, or revolves around the Sun. This movement is called revolution.
Robert is thinking about buying a new refrigerator. His old refrigerator runs at about 43% efficiency. Which most likely accounts for the remaining 57% of the energy?
A: It is used up by the light in the refrigerator.
B: It is released to the surroundings as heat
C: It is converted into mechanical energy.
D: It stored as a form of potential energy.
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Answer:
D it stores as a firm of potential energy
Identify and describe the different forms of precipitation shown in the images.
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Answer:
It was first just snow but now its snow ball eggs that's what it looks like hope it helps:)
Explanation:
What is the relationship between guard cells and stomata in plants?
Guard cells open and close the stomata to regulate the rate of transpiration.
Guard cells protect the stomata from insects and other pests.
Guard cells store carbon dioxide for later use by the stomata.
Guard cells absorb light energy from the Sun for use by the stomata.
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Answer:
Guard cells open and close the stomata to regulate the rate of transpiration. Hope I helped
In a solid, the molecules are held together _____________ in their position.
A. Tightly
B. Loosely
C. Freely
D Gently
(is it tightly or gently??)
ik this is easy but can't decide
Answers
To help remember solids are really hard so they have the tightly cram together
But I’m liquids they’re more free to do whatever they want as long as they are close
Hope this helps :)