Question 1

Which of the following statements best describes the difference between a period and a group in the periodic table?

Accepted Answer

A period is a horizontal row, and a group is a vertical column.

Question 2

Which element is classified as a metalloid?

Accepted Answer

Silicon (Si)

Question 3

What is the correct formula for the ionic compound formed between magnesium and nitrogen?

Accepted Answer

$$\mathrm{Mg_2N_3}$$

Question 4

Which of the following is the empirical formula for hydrogen peroxide?

Accepted Answer

$$\mathrm{HO}$$

Question 5

What is the systematic name for the compound $$\mathrm{N_2O_5}$$?

Accepted Answer

Dinitrogen pentoxide

Question 6

Which of the following ions is a polyatomic ion?

Accepted Answer

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

Question 7

What is the correct name for the compound $$\mathrm{$$FeCl_3$$ \cdot 6H_2O}$$?

Accepted Answer

Iron(III) chloride hexahydrate

Question 8

Which of the following compounds is an example of a binary molecular compound?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 9

What is the formula for calcium perchlorate?

Accepted Answer

$$\mathrm{Ca($$ClO_4$$)_2}$$

Question 10

Which of the following best describes a combustion reaction?

Accepted Answer

A reaction in which a hydrocarbon reacts with oxygen to produce carbon dioxide and water.

Question 11

What is the formula weight of water ($$\mathrm{H_2O}$$)? (Atomic masses: H = 1.01 amu, O = 16.00 amu)

Accepted Answer

$$18.02\ \mathrm{amu}$$

Question 12

Which of the following is the correct balanced chemical equation for the formation of ammonia from hydrogen and nitrogen gases?

Accepted Answer

$$3H_2(g) + N_2$(g) \rightarrow 2NH_3(g)$$

Question 13

Which of the following is the correct name for $$\mathrm{Na_2SO_3}$$?

Accepted Answer

Sodium sulfite

Question 14

What is the charge on the ion formed by an alkali metal?

Accepted Answer

$$1+$$

Question 15

Which of the following is the correct formula for potassium sulfide?

Accepted Answer

$$\mathrm{K_2S}$$

Question 16

Which of the following is a property of nonmetals?

Accepted Answer

They are poor conductors of heat and electricity.

Question 17

What is the correct name for $$\mathrm{Cu_2O}$$ using the stock system?

Accepted Answer

Copper(I) oxide

Question 18

Which of the following is the correct formula for calcium sulfate dihydrate?

Accepted Answer

$$\mathrm{$$CaSO_4$$ \cdot 2H_2O}$$

Question 19

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

Accepted Answer

$$\mathrm{(NH_4$)_2SO_3}$$

General Chemistry Study Notes: Periodic Table, Compounds, and Chemical Equations

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