Electron configuration

Open Ended

How are the Pauli exclusion principle, the Aufbau principle, and Hund’s rule used to write electron configurations?

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Multiple Choice

What is the sequence of energy sublevels within a principal energy level according to the Aufbau diagram?

• s, p, d, f

• p, s, d, f

• d, p, s, f

• f, d, p, s

Multiple Choice

What does Aufbau's principle state about electron configuration?

• Electrons fill higher energy orbitals first

• Electrons fill lower energy orbitals first

• Electrons can occupy any orbital

• Electrons must be paired in orbitals

Multiple Choice

What is incorrect about this orbital diagram?

• Both arrows in the 2p box should be pointing up

• Nothing

• One of the electrons in the first 2p box should be placed in the second 2p box, still pointing down

• One of the electrons in the first 2p box should be placed in the second 2p box, pointing up

Multiple Choice

What principle is being violated in the diagram regarding electron configuration?

• Hund's Rule

• Pauli Exclusion Principle

• Aufbau Principle

• Octet Rule

Multiple Choice

According to Hund's Rule, how should electrons be distributed in equal-energy orbitals?

• All electrons should occupy the same orbital first

• Single electrons must occupy the orbitals within the same energy level first

• Electrons can pair up in any orbital

• Electrons should be distributed randomly

Multiple Choice

What is the electron configuration for a ground-state carbon atom as represented in the orbital diagram?

• 1s² 2s² 2p¹

• 1s² 2s² 2p²

• 1s² 2s¹ 2p²

• 1s² 2s² 2p⁰

Fill in the Blanks

The aufbau principle states that each electron occupies the

energy
orbital available.

Multiple Choice

What does the periodic table indicate about the electron configurations of elements?

• It shows the atomic mass of elements.

• It indicates the number of protons in an atom.

• It serves as a guide for electron configurations.

• It lists all known elements in alphabetical order.

Multiple Choice

Is this the correct Lewis Dot Structure for Boron?

• Yes

• No, missing electrons

• No, too many electrons

• No, dots are in wrong place.

Open Ended

Write the noble gas configuration for calcium

Multiple Choice

Noble gases are sometimes called "inert gases." What can you infer about the meaning of the word "inert" in chemistry?

• It refers to substances that easily lose electrons.

• It refers to substances that do not react with other substances.

• It refers to substances that have strong electrochemical charges.

• It refers to gases.

Multiple Choice

What are the steps to write the noble gas configuration?

• Write the symbol of the preceding noble gas.

• Subtract the number of electrons of the noble gas from that of the element assigned.

• Use the row number to get the energy level.

• All of the above.

Multiple Choice

Why are the elements in group 18 stable and non-reactive?

• Because they are all gases

• There outermost electron shell is full

• They all have 3 valence electrons

• They have an even number of protons