4. classify the following compounds as ionic or molecular: a) mgcl₂ b) albr₃ c) c₂₅h₅₂ d) sio₂ e) ca₃n₂ 5…

Explanation:

Step1: Recall compound - classification rules

Ionic compounds are usually formed between metals and non - metals, while molecular compounds are formed between non - metals.

Step2: Classify compounds in question 4

a) $MgCl_2$

Magnesium (Mg) is a metal and chlorine (Cl) is a non - metal, so it is ionic.

b) $AlBr_3$

Aluminum (Al) is a metal and bromine (Br) is a non - metal, so it is ionic.

c) $C_{25}H_{52}$

Carbon (C) and hydrogen (H) are non - metals, so it is molecular.

d) $SiO_2$

Silicon (Si) and oxygen (O) are non - metals, so it is molecular.

e) $Ca_3N_2$

Calcium (Ca) is a metal and nitrogen (N) is a non - metal, so it is ionic.

Step3: Name compounds in question 5

a) $CsBr$

Cesium bromide.

b) $BaO$

Barium oxide.

c) $Ca_3P_2$

Calcium phosphide.

d) potassium chloride

$KCl$.

e) aluminum bromide

$AlBr_3$.

f) potassium oxide

$K_2O$.

Step4: Name compounds in question 6

a) $P_2O_5$

Diphosphorus pentoxide.

b) $CF_4$

Carbon tetrafluoride.

c) $PH_3$

Phosphine.

d) dinitrogen tetrafluoride

$N_2F_4$.

e) sulfur hexachloride

$SCl_6$.

g) sulfur dibromide

$SBr_2$.

Answer:

a) Ionic b) Ionic c) Molecular d) Molecular e) Ionic 5. a) Cesium bromide b) Barium oxide c) Calcium phosphide d) $KCl$ e) $AlBr_3$ f) $K_2O$ 6. a) Diphosphorus pentoxide b) Carbon tetrafluoride c) Phosphine d) $N_2F_4$ e) $SCl_6$ g) $SBr_2$