Question 1

Which of the following statements best describes why alkali metals (Group 1) are highly reactive?

Accepted Answer

They have one valence electron, which they lose easily to form $$+1$$ ions.

Question 2

Which of the following is the empirical formula for glucose, whose molecular formula is $$\mathrm{C_6H_{12}O_6$}$$?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 3

A sample of an unknown compound is found to contain $$40.0\%$$ carbon, $$6.7\%$$ hydrogen, and $$53.3\%$$ oxygen by mass. What is the empirical formula of this compound?

Accepted Answer

$$\mathrm{CH_2O}$$

Question 4

Which of the following best explains why metals are good conductors of electricity?

Accepted Answer

Metals have a sea of delocalized electrons that can move freely.

Question 5

Which of the following is a property of nonmetals?

Accepted Answer

They tend to gain electrons and form anions.

Question 6

Which of the following compounds is most likely to be an ionic compound?

Accepted Answer

$$\mathrm{NaCl}$$

Question 7

What is the charge on the sulfate ion?

Accepted Answer

$$2-$$

Question 8

Which of the following best describes an isomer?

Accepted Answer

A molecule with the same molecular formula but a different structure.

Question 9

Which of the following is the correct general formula for alkanes?

Accepted Answer

$$\mathrm{C_nH_{2n+2}}$$

Question 10

Which of the following best describes the bonding in a metallic solid?

Accepted Answer

Atoms are held together by a sea of delocalized electrons.

Question 11

A sodium atom ($$\mathrm{Na}) $$loses one electron to form a sodium ion ($$\mathrm{Na^+}). $$Which of the following statements is correct?

Accepted Answer

The sodium ion has more protons than electrons.

Question 12

Which of the following is a polyatomic ion?

Accepted Answer

$$\mathrm{NO_3$^-}$$

Question 13

Which of the following best describes the difference between a molecular formula and an empirical formula?

Accepted Answer

A molecular formula shows the actual number of atoms, while an empirical formula shows the simplest whole-number ratio.

Question 14

Which of the following is the correct formula for ammonium ion?

Accepted Answer

$$\mathrm{NH_4$^+}$$

Question 15

Which of the following best describes a carboxylic acid functional group?

Accepted Answer

A $$-COOH$$ group bonded to a carbon atom.

Question 16

Which of the following elements is a metalloid?

Accepted Answer

Silicon (Si)

Question 17

Which of the following best explains why ionic compounds tend to have high melting points?

Accepted Answer

Strong electrostatic forces hold the ions together in a crystal lattice.

Question 18

Which of the following is the correct name for $$\mathrm{C_2H_6}$$?

Accepted Answer

Ethane

Question 19

Which of the following best describes the process of forming an ionic bond between sodium and chlorine?

Accepted Answer

Sodium loses an electron to become $$\mathrm{Na^+}$$, chlorine gains an electron to become $$\mathrm{Cl^-}$$, and they are held together by electrostatic attraction.

A Brief Tour of How Atoms Assemble: The Periodic Table, Atomic Structure, and Basic Organic Chemistry

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