Question 1

Which of the following elements is most likely to form a cation with a +2 charge?

Accepted Answer

Magnesium

Question 2

What is the correct formula for chromium(VI) phosphide?

Accepted Answer

$$\mathrm{CrP}_2$$

Question 3

Which statement best describes the octet rule?

Accepted Answer

Atoms tend to gain, lose, or share electrons to achieve 8 electrons in their outermost shell.

Question 4

What is the name of the compound with the formula $$\mathrm{BaSO}_4$$?

Accepted Answer

Barium sulfate

Question 5

Which of the following ions is a polyatomic ion?

Accepted Answer

$$\mathrm{SO}_4$$^{2-}$$

Question 6

What is the correct formula for iron(III) chloride?

Accepted Answer

$$\mathrm{FeCl}_3$$

Question 7

Which of the following molecules is polar?

Accepted Answer

$$\mathrm{H}_2\mathrm{O}$$

Question 8

A sodium atom loses one electron to form a sodium ion. What is the charge of the resulting ion?

Accepted Answer

$$+1$$

Question 9

Which of the following best describes the difference between ionic and covalent bonds?

Accepted Answer

Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons.

Question 10

What is the correct name for the compound $$\mathrm{SF}_6$$?

Accepted Answer

Sulfur hexafluoride

Question 11

Which of the following elements has 7 valence electrons?

Accepted Answer

Chlorine

Question 12

What is the formula for cesium telluride?

Accepted Answer

$$\mathrm{Cs}_2\mathrm{Te}$$

Question 13

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

Accepted Answer

$$\mathrm{ZnSO}_4$$

Question 14

Which of the following statements about noble gases is correct?

Accepted Answer

Noble gases have a stable electron configuration and rarely form compounds.

Question 15

What is the correct name for $$\mathrm{WO}_3$$?

Accepted Answer

Tungsten trioxide

Question 16

Which of the following best explains why water ($$\mathrm{H}_2\mathrm{O}) is a $$polar molecule?

Accepted Answer

The oxygen atom attracts electrons more strongly than hydrogen, creating a partial negative charge on oxygen.

Question 17

Which of the following is the correct formula for cobalt(III) nitrite?

Accepted Answer

$$\mathrm{Co(NO}_2)_3$$

Question 18

Which of the following compounds contains both ionic and covalent bonds?

Accepted Answer

$$\mathrm{MgSO}_4$$

Question 19

A student mixes copper(II) oxide and silver selenide. Which formula represents copper(II) oxide?

Accepted Answer

$$\mathrm{CuO}$$

Question 20

Which of the following is the correct name for $$\mathrm{N}_2\mathrm{O}_4$$?

Accepted Answer

Dinitrogen tetroxide

Ions, Ionic and Covalent Compounds: GOB Chemistry Study Notes

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