Phosphorus has three electrons in its 3p sublevel and sulfur has four.
Phosphorus should have the lower ionization energy but it does not,
sulfur does. What does this provide evidence for?
A. Aufbau's principle
B. Conservation of energy
C. Hund' rule
D. None of these
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Answer:

The correct answer is C. Hund's rule.

Hund's rule states that for atoms in their ground state, electrons will occupy orbitals of the same energy level one by one before pairing up. This means that when filling the 3p sublevel, phosphorus should have one electron in each of the three 3p orbitals before any of them start pairing up.

However, in reality, sulfur has a lower ionization energy than phosphorus. This means that it is easier to remove an electron from sulfur than from phosphorus. This contradicts the expectation based on Hund's rule.

Therefore, the fact that sulfur has a lower ionization energy than phosphorus provides evidence that Hund's rule is not the only factor governing the electron configuration and ionization energies of elements. Other factors, such as electron-electron repulsion and the stability of half-filled or filled subshells, also play a role.

Give an example of how you could use different reference frames for the same motion.

1. What is the main property of a good insulator?
2. Should you use glass or silver as an insulating material and why?
3. Why are insulators useful?

What is one way that potential energy might be involved in rescue team missions?

Hope y’all can see this, I need help

George Washington Carver received _____ from God during early morning walks in the woods.?
1. Guidance
2. Inspiration
3. Finances
4. Solutions
(There more than one answer.)

What compound is essential for virtually all biochemical reactions?

Please explain your answer.

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

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.

In your own words, explain how gametes (the cells made for sexual reproduction) differ from normal body cells.



Write your response below.

The image shows the gravitational effects of the moon (not shown) on the Earth (depicted here) and the resulting tides that form. Which statements are true about the gravitational force between the Earth and the moon? Select ALL that apply.
Responses
A The moon exerts equal gravitational force on all locations of the Earth
B The moon exerts a smaller gravitational force on Earth locations that are farther away
C The moon must be to the right of the Earth because gravity is an attractive force.
D The moon must be to the left of the Earth because gravity is a repulsive force.
E The moon exerts a greater gravitational force on the Earth than the sun does.

Can someone help me with this math question plzz thx!!

1 Imagine you have two beakers of 75 g each. You pour 50 g of water in one beaker and 100 g of vinegar in the second beaker. Placing both containers on the scale you measure 300 g. You pour the water in with the vinegar and measure the mass of the beaker of liquid. Based on the information above and the image below, what does your scale read?
a. 225 g
b. 150 g
c. 375 g
d. 300 g

How did this piece of evidence change your thinking about the channel on Mars? Explain your ideas below.

What is an ellipse please help)

A balloon is filled with 6.5 L of helium gas at 25oC and 1.0 atm. What volume will the balloon have when the temperature is lowered to -25oC and the pressure is increased to 1.5 atm?

A brief summary of Cytokinesis? Its for science plz help fast!

Help! I need to finish work. Brainlist will be given to the most helpful!

When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

how did alexa canadys accomplishment impact the general public

What is the relationship between reflection and diffraction? A. Reflection happens when a wave hits a hard surface, while diffraction only happens when a wave goes through air or water. B. Reflection happens when a wave hits a hard surface, while diffraction happens when two waves interact with each other. C. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave goes through an obstacle. D. Reflection happens when a wave bounces back against an obstacle, while diffraction happens when a wave bends around an obstacle.

which is a mixture?
A. Water reacting with oxygen
B. Salt dissolved in water
C. Sodium and chlorine in a molecule
D. A solid aluminum pan

Match each letter with the correct label. Use the atom diagram below.

Electron - Nucleus - Proton - Neutron

Please answer ASAP, this is for 100 points on a test, please help
Examine the image provided. The different colors on the continents represent where fossils of this organism, the Mesosaurus, can be found. The Mesosaurus was an ancient reptile creature that could only swim short distances in fresh water. Use your knowledge of the Tectonic Plate Theory to explain how fossils of this one organism could be found on so many continents.
In you response be sure to include specific evidence for the Theory of Plate Tectonics and a general time scale for how long this geologic process may take.

Ricardo and Maria conducted an experiment to test if the mass of a ball affects how fast it would roll down a ramp. They set up the experiment using a ramp and three balls of different masses. They tested each ball once and recorded their results. They concluded that the more mass a ball has, the faster it will roll down the ramp. Why is this experiment not reliable?


Their experiment was not controlled.


Their experiment did not test enough variables.


Their experiment was not performed multiple times.


Their experiment was not performed by multiple people.

Calculate the volume (in cm3
) of 54 g
of water at 1 ∘C
.
Express the volume in cubic centimeters to two significant figures.

NEED HELP\
I GIVE BRAIN

Magnesium is a shiny, flexible Material that can be burned in the presence of air. When it is burned, it produces a white powder that is is no longer a shiny and flexible material. This white powder also has more mass than the original magnesium.

Choose the one that best gives the best evidence that a chemical reaction occurred, explain.

A - The molecules were separated into individual atoms.
B - The mass of the magnesium changed.
C - Smoke that was trapped between the magnesium atoms was given off.
D - A new substance was formed.

The students need to find out things like how much matter and energy are used to make the bottles and cans.

What are two other things the students should look at before evaluating which container is better for the environment? (2 points)

which two statements are true for both compounds and mixtures
A. Their particles are held together by chemical bonds
B. Their particles all have the same chemical formula
C. They are made up of more than one type of atom
D. They can be separated into two or more elements

Order the terms according to the path followed by oxygen during cellular respiration.