Question 1

Which subatomic particle determines the identity of an element?

Accepted Answer

Proton

Question 2

What is the electron configuration for bromine (Br)?

Accepted Answer

$$[Ar] 4s^2$ 3d$$^{10}$$ 4p^5$

Question 3

Which element is classified as an alkali metal?

Accepted Answer

Rubidium

Question 4

What is the correct formula for magnesium chloride?

Accepted Answer

$$MgCl_2$$

Question 5

Which orbital type can hold a maximum of 6 electrons?

Accepted Answer

p-orbital

Question 6

What is the molecular geometry of water ($$H_2O$$)?

Accepted Answer

Bent

Question 7

Which of the following is a polyatomic ion?

Accepted Answer

$$NO_3$$^-$$

Question 8

What is the symbol for the radioactive particle emitted during alpha decay?

Accepted Answer

$$^4_2He$$

Question 9

If an atom has 14 protons, 14 neutrons, and 14 electrons, what is its atomic symbol?

Accepted Answer

$$^{28}_{14}Si$$

Question 10

Which element has the highest ionization energy among the following?

Accepted Answer

Fluorine

Question 11

What is the formula for calcium phosphate?

Accepted Answer

$$Ca_3$$($$PO_4)_2$

Question 12

Which of the following best describes a covalent compound?

Accepted Answer

Formed by sharing electrons between two or more nonmetals

Question 13

What is the correct Lewis structure for $$CO_2$$?

Accepted Answer

O=C=O with no lone pairs on carbon

Question 14

Which of the following ions is responsible for the acidity in hydrochloric acid ($$HCl) $$when dissolved in water?

Accepted Answer

$$H^+$$

Question 15

What is the electron geometry of ammonia ($$NH_3$$)?

Accepted Answer

Tetrahedral

Question 16

Which of the following describes the trend of ionization energy across a period in the periodic table?

Accepted Answer

Increases from left to right

Question 17

How many electrons can a d-orbital hold in a single energy level?

Accepted Answer

10

Question 18

What is the formula for potassium sulfate?

Accepted Answer

$$K_2SO_4$$

Question 19

Which of the following is a transition metal ion commonly found in ionic compounds?

Accepted Answer

$$Fe^{2+}$$

Question 20

If 100 g of $$^{131}I$$ has a half-life of 8.0 days, how much remains after 24 days?

Accepted Answer

12.5 g

Atoms, Elements, and Chemical Bonding: Mini-Textbook Study Guide

Study Guide - Practice Questions