Question 1

Which noble gas is used as the starting point for the condensed electron configuration of aluminum (Al)?

Accepted Answer

Neon (Ne)

Question 2

What is the condensed electron configuration for zinc (Zn)?

Accepted Answer

$$[Ar]\ 4s^2$\ 3d$$^{10}$$

Question 3

When writing a condensed electron configuration, what is the primary reason for using the noble gas in brackets?

Accepted Answer

To simplify the notation by representing core electrons

Question 4

Which of the following is the correct order for filling electron orbitals according to the Aufbau principle?

Accepted Answer

$$1s \rightarrow 2s \rightarrow 2p \rightarrow 3s \rightarrow 3p \rightarrow 4s \rightarrow 3d$$

Question 5

Which element has the condensed electron configuration $$[Ne]\ 3s^2$\ 3p^1$?

Accepted Answer

Aluminum (Al)

Question 6

A patient is exposed to a large amount of zinc. Which electron configuration would you use to identify the element in a blood sample?

Accepted Answer

$$[Ar]\ 4s^2$\ 3d$$^{10}$$

Question 7

Which of the following statements about condensed electron configurations is TRUE?

Accepted Answer

They use the previous noble gas to represent core electrons.

Question 8

For the element phosphorus (P), what is the condensed electron configuration?

Accepted Answer

$$[Ne]\ 3s^2$\ 3p^3$

Question 9

Which orbital is filled immediately after $$4s in $$the electron configuration sequence?

Accepted Answer

$$3d$$

Question 10

A scientist is analyzing an unknown element with the condensed electron configuration $$[Ar]\ 4s^2$\ 3d^5$. Which element is this?

Accepted Answer

Manganese (Mn)

Question 11

Which of the following elements has a condensed electron configuration ending in $$3p^6$$?

Accepted Answer

Argon (Ar)

Question 12

If an element has the condensed electron configuration $$[Ne]\ 3s^2$\ 3p^4$, how many valence electrons does it have?

Accepted Answer

6

Question 13

Which of the following is the correct condensed electron configuration for potassium (K)?

Accepted Answer

$$[Ne]\ 3s^2$\ 3p^6$\ 4s^1$

Question 14

Which element has the condensed electron configuration $$[Ne]\ 3s^2$\ 3p^5$?

Accepted Answer

Chlorine (Cl)

Question 15

A medical researcher needs to identify an element with the electron configuration $$[Ar]\ 4s^2$\ 3d^8$. Which element is this?

Accepted Answer

Nickel (Ni)

Question 16

Which of the following is the correct condensed electron configuration for calcium (Ca)?

Accepted Answer

$$[Ne]\ 3s^2$\ 3p^6$\ 4s^2$

Question 17

Which element has the condensed electron configuration $$[Ne]\ 3s^2$\ 3p^6$?

Accepted Answer

Argon (Ar)

Question 18

A sample contains an element with the condensed electron configuration $$[Ar]\ 4s^2$\ 3d^6$. Which element is present?

Accepted Answer

Iron (Fe)

Question 19

Which of the following is the correct condensed electron configuration for magnesium (Mg)?

Accepted Answer

$$[Ne]\ 3s^2$

Question 20

Which element has the condensed electron configuration $$[Ar]\ 4s^2$\ 3d^7$?

Accepted Answer

Cobalt (Co)

Condensed Electron Configuration: Principles and Practice

Study Guide - Practice Questions