College Chemistry Quiz: Valence Electrons And Ionic Compounds

What this quiz covers

This quiz focuses on Valence Electrons And Ionic Compounds, giving you a quick way to practice the rules, question types, and explanations that matter most for College Chemistry.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. Metals gain valence electrons to achieve noble gas configurations when forming ionic compounds
2. The number of valence electrons equals the group number for all main group elements
3. Nonmetals in Groups 15-17 typically gain electrons equal to (18 minus their group number) to achieve stability (correct answer)
4. Transition metals always lose all their valence electrons when forming ions
5. Elements in the same group form ions with identical charges in all ionic compounds

Question 2

1. $Ca^{2+}$ and $Cl^{-}$ (correct answer)
2. $Mg^{2+}$ and $O^{2-}$
3. $Al^{3+}$ and $F^{-}$
4. $Na^{+}$ and $S^{2-}$
5. $K^{+}$ and $Br^{-}$

Question 3

1. $1s^2 2s^2 2p^6 3s^2$
2. $1s^2 2s^2 2p^6 3s^2 3p^4$ (correct answer)
3. $1s^2 2s^2 2p^6 3s^2 3p^6 4s^1$
4. $1s^2 2s^2 2p^6 3s^2 3p^6 4s^2$
5. $1s^2 2s^2 2p^6 3s^2 3p^5$

Question 4

1. $MgZ$
2. $Mg_2Z$
3. $MgZ_2$
4. $Mg_3Z_2$ (correct answer)
5. $Mg_2Z_3$

Question 5

1. $AB$
2. $A_2B$
3. $AB_2$
4. $A_2B_3$ (correct answer)
5. $A_3B_2$

Question 6

1. The total number of valence electrons is conserved during ionic compound formation, but some electrons are redistributed between atoms (correct answer)
2. Valence electrons are destroyed when metals and nonmetals combine to form ionic compounds
3. New valence electrons are created to fill the octets of both metals and nonmetals in ionic compounds
4. Only the valence electrons of nonmetals are involved in ionic compound formation
5. Valence electrons are converted to core electrons during ionic compound formation

Question 7

1. Q would lose 4 electrons to form $Q^{4+}$
2. Q would gain 4 electrons to form $Q^{4-}$
3. Q would not form a stable ionic compound with fluorine (correct answer)
4. Q would form covalent bonds with fluorine instead
5. Q would both lose and gain electrons simultaneously

Question 8

1. $XO$
2. $X_2O$
3. $XO_2$
4. $X_2O_3$ (correct answer)
5. $X_3O_2$

Question 9

1. 3
2. 6 (correct answer)
3. 9
4. 12
5. 18

Question 10

1. 35
2. 37
3. 54 (correct answer)
4. 57
5. 75

Question 11

1. $1s^2 2s^2 2p^6 3s^1$ (correct answer)
2. $1s^2 2s^2 2p^6 3s^2$
3. $1s^2 2s^2 2p^6 3s^2 3p^1$
4. $1s^2 2s^2 2p^6 3s^2 3p^3$
5. $1s^2 2s^2 2p^6 3s^2 3p^5$

Question 12

1. 1:1 (correct answer)
2. 2:3
3. 3:2
4. 6:6
5. 9:6

Question 13

1. 0.2 M
2. 0.4 M
3. 0.6 M
4. 0.8 M (correct answer)
5. 1.0 M

Question 14

1. $NaCl$
2. $AlF_3$
3. $CaBr_2$ (correct answer)
4. $Li_2O$
5. $FeCl_3$

Question 15

1. Elements with 1-3 valence electrons typically gain electrons equal to their group number
2. Elements with 5-7 valence electrons typically lose electrons to achieve a stable octet configuration
3. The ionic charge magnitude equals the number of valence electrons for all main group elements
4. Elements with 4 valence electrons typically form ions with charges of +4 or -4
5. Elements with 1-3 valence electrons typically form positive ions with charge equal to their number of valence electrons (correct answer)

Question 16

1. $MY$
2. $MY_2$ (correct answer)
3. $M_2Y$
4. $M_2Y_3$
5. $MY_3$

Question 17

1. 1
2. 2 (correct answer)
3. 3
4. 4
5. 6

Question 18

1. 2
2. 3 (correct answer)
3. 5
4. 8
5. 13