Quiz about Electron Configuration Mastery Quiz

Question 1

What is the maximum number of electrons that can occupy the s orbital at any given energy level?

Accepted Answer

2

Answer

1

Answer

4

Answer

8

Question 2

Which of the following electron configurations represents the nitrogen atom?

Accepted Answer

1s $$^2$$ 2s $$^2$$ 2p $$^3$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^4$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^5$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$

Question 3

According to the Aufbau principle, which orbital is filled immediately after the 3p orbital?

Accepted Answer

4s

Answer

3d

Answer

4p

Answer

3s

Question 4

How many valence electrons does chlorine have?

Accepted Answer

7

Answer

5

Answer

6

Answer

8

Question 5

What is the correct electron configuration notation for magnesium?

Accepted Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^1$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^4$$ 3s $$^2$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3p $$^1$$

Question 6

Which rule states that electrons must occupy every orbital singly before any orbital is doubly occupied?

Accepted Answer

Hund's Rule

Answer

Pauli Exclusion Principle

Answer

Aufbau Principle

Answer

Heisenberg Uncertainty Principle

Question 7

How many electrons can the d orbital hold?

Accepted Answer

10

Answer

2

Answer

6

Answer

8

Question 8

Which of the following elements has a valence of 2?

Accepted Answer

Magnesium

Answer

Oxygen

Answer

Carbon

Answer

Neon

Question 9

What is the electron configuration of potassium?

Accepted Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$ 3p $$^6$$ 4s $$^1$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$ 3p $$^6$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^1$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$ 3p $$^5$$

Question 10

Which principle explains the pattern of electron filling in an atom?

Accepted Answer

Aufbau Principle

Answer

Hund's Rule

Answer

Pauli Exclusion Principle

Answer

Dalton's Atomic Theory

Question 11

What is the maximum number of valence electrons an element can have?

Accepted Answer

8

Answer

2

Answer

6

Answer

18

Question 12

Which of the following is the correct electron configuration for sulfur?

Accepted Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$ 3p $$^4$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^2$$ 3p $$^6$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^4$$ 3s $$^2$$ 3p $$^4$$

Answer

1s $$^2$$ 2s $$^2$$ 2p $$^6$$ 3s $$^1$$ 3p $$^5$$

Question 13

Which of the following elements follows the electron configuration notation 1s $$^2$$ 2s $$^2$$ 2p $$^6$$ ?

Accepted Answer

Neon

Answer

Lithium

Answer

Beryllium

Answer

Fluorine

Question 14

According to Hund's rule, how will the three 2p orbitals be filled with three electrons?

Accepted Answer

Each electron will occupy separate orbitals with parallel spins.

Answer

All three electrons will pair up in one orbital.

Answer

Two electrons will pair up in one orbital, and the third will occupy a separate orbital.

Answer

Electrons will fill the lowest energy orbital available first.

Question 15

What is the significance of the Pauli Exclusion Principle in electron configuration?

Accepted Answer

It states that no two electrons can have the same set of four quantum numbers.

Answer

It dictates the maximum number of electrons in an atom.

Answer

It describes the sequence in which orbitals are filled.

Answer

It determines the spin of electrons in an orbital.

Question 16

Which element has the electron configuration 1s $$^2$$ 2s $$^2$$ 2p $$^5$$ ?

Accepted Answer

Fluorine

Answer

Oxygen

Answer

Neon

Answer

Nitrogen

Question 17

How does the electron configuration of ions differ from that of neutral atoms?

Accepted Answer

Ions gain or lose electrons to achieve a stable electron configuration.

Answer

Ions have more protons than neutral atoms.

Answer

Ions have an incomplete outer shell.

Answer

Ions do not follow the Aufbau principle.

Question 18

What is the purpose of the Aufbau diagram?

Accepted Answer

To depict the order in which orbitals are filled

Answer

To show the physical structure of an atom

Answer

To illustrate the spin of electrons

Answer

To represent chemical bonding between atoms

Electron Configuration Mastery Quiz

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