Question 1

Which of the following is the correct chemical symbol for the element magnesium?

Accepted Answer

Mg

Question 2

Which element is represented by the symbol 'K' on the periodic table?

Accepted Answer

Potassium

Question 3

A neutral sodium atom loses one electron. What is the resulting ion and its charge?

Accepted Answer

$$\mathrm{Na^+}$$

Question 4

Which of the following elements is a metalloid?

Accepted Answer

Silicon

Question 5

What is the correct formula for the ionic compound formed between barium and chlorine?

Accepted Answer

$$\mathrm{$$BaCl_2$$}$$

Question 6

Which of the following is the correct name for the compound $$\mathrm{$$FeCl_2$$}$$?

Accepted Answer

Iron(II) chloride

Question 7

What is the correct formula for aluminum oxide?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 8

Which of the following compounds contains a polyatomic ion?

Accepted Answer

$$\mathrm{Na_2SO_4}$$

Question 9

What is the correct name for $$\mathrm{$$NaNO_3$$}$$?

Accepted Answer

Sodium nitrate

Question 10

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

Accepted Answer

$$\mathrm{(NH_4$)_2SO_4}$$

Question 11

Which of the following best describes the bonding in a molecule of carbon dioxide ($$\mathrm{CO_2$}$$)?

Accepted Answer

Covalent bonds formed by sharing electrons

Question 12

What is the correct name for $$\mathrm{P_2O_5}$$?

Accepted Answer

Diphosphorus pentoxide

Question 13

Which of the following is a property of ionic compounds?

Accepted Answer

High melting points

Question 14

A patient is prescribed an antacid containing aluminum hydroxide. What is the formula for aluminum hydroxide?

Accepted Answer

$$\mathrm{Al(OH)_3}$$

Question 15

Which of the following is the correct formula for dinitrogen trioxide?

Accepted Answer

$$\mathrm{N_2O_3}$$

Question 16

Which of the following is the correct name for $$\mathrm{SF_6$}$$?

Accepted Answer

Sulfur hexafluoride

Question 17

A compound is named potassium iodide. What is its chemical formula?

Accepted Answer

$$\mathrm{KI}$$

Question 18

Which of the following is a molecular compound?

Accepted Answer

$$\mathrm{CO_2$}$$

Question 19

What is the correct formula for calcium phosphate, a mineral important for bone health?

Accepted Answer

$$\mathrm{Ca_3$(PO_4$)_2}$$

Question 20

Which of the following ions is formed when chlorine gains one electron?

Accepted Answer

$$\mathrm{Cl^-}$$

Atoms, Elements, and Ionic & Molecular Compounds: Study Notes for GOB Chemistry

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