Question 1

Which of the following polyatomic ions has a charge of $$-2$$?

Accepted Answer

$$SO_4$$^{2-}

Question 2

What is the correct electron configuration for aluminum ($$Z=13$$)?

Accepted Answer

$$1s^22s^22$p^63s^23$p^1$$

Question 3

Which element in Period 4 and Group 2A (2) of the periodic table is represented by the symbol?

Accepted Answer

Ca

Question 4

A potassium atom with 20 neutrons has what mass number?

Accepted Answer

39

Question 5

Which of the following elements is a nonmetal?

Accepted Answer

Nitrogen

Question 6

What is the abbreviated electron configuration for nickel ($$Z=28$$)?

Accepted Answer

$$[Ar]4s^23$d^8$

Question 7

Which element has the smallest ionization energy among B, C, F, Li, and Na?

Accepted Answer

Na

Question 8

Which element has the smallest atomic radius among B, C, F, Li, and Na?

Accepted Answer

F

Question 9

What is the correct formula for a compound formed from aluminum and oxygen?

Accepted Answer

Al_2O_3

Question 10

Which of the following compounds contains an ionic bond?

Accepted Answer

CaO

Question 11

The correct name for the compound $$IF_3 is$$:

Accepted Answer

Iodine trifluoride

Question 12

How many lone pairs of electrons are in the Lewis structure of $$H_2O$$?

Accepted Answer

2

Question 13

Which element forms two or more ions with different ionic charges?

Accepted Answer

Fe

Question 14

What is the symbol for the ion with 19 protons and 18 electrons?

Accepted Answer

K^+

Question 15

The name of $$Al_2$$($$SO_4)_3$ is:

Accepted Answer

Aluminum sulfate

Question 16

The formula of copper(I) sulfide is:

Accepted Answer

Cu_2S

Question 17

Which of the following best describes the bonding in a molecule with covalent bonding?

Accepted Answer

Atoms are held together by sharing electrons.

Question 18

The carbon tetrachloride molecule, $$CCl_4$$, has what shape?

Accepted Answer

Tetrahedral

Question 19

Which of the following polyatomic ions is found in baking soda and is important in maintaining blood pH?

Accepted Answer

$$HCO_3^-$$

Question 20

A patient is diagnosed with cyanide poisoning. Which polyatomic ion is responsible for this toxicity?

Accepted Answer

CN^-

General, Organic, and Biological Chemistry (GOB) Exam Study Guide: Atomic Structure, Periodic Table, and Chemical Bonding

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