Question

name: identifying ionic compounds, covalent compounds, and polyatomic ions identify the formulas of the following as either ionic (i), covalent (c), or polyatomic (p). a) kbr k) nacl b) po₄³⁻ l) cu₂o c) h₂o₂ m) no₃⁻ d) mg(oh)₂ n) li₂co₃ e) hno₃ o) mg(hco₃)₂ f) nh₄⁺ p) na₂so₄ g) c₆h₁₂o₆ q) k₂so₃ h) p₂o₃ r) al(cn)₃ i) nh₃ s) (nh₄)₃po₄ j) rabr₂ t) co₃²⁻

Explanation:

To solve this, we identify each compound/ion:

a) \( \text{KBr} \)

• Ionic (I): Metal (K) + non - metal (Br).

b) \( \text{PO}_4^{3 - } \)

• Polyatomic (Pi): A charged group of atoms.

c) \( \text{H}_2\text{O}_2 \)

• Covalent (C): Non - metals (H, O) sharing electrons.

d) \( \text{Mg(OH)}_2 \)

• Ionic (I): Metal (Mg) + polyatomic ion (\( \text{OH}^ - \)).

e) \( \text{HNO}_3 \)

• Ionic (I): Contains \( \text{H}^ + \) and \( \text{NO}_3^ - \) (though covalent within \( \text{NO}_3^ - \), overall ionic due to \( \text{H}^ + \)).

f) \( \text{NH}_4^ + \)

• Polyatomic (Pi): Charged group of atoms.

g) \( \text{C}_6\text{H}_{12}\text{O}_6 \)

• Covalent (C): Non - metals (C, H, O) in a molecular compound.

h) \( \text{P}_2\text{O}_3 \)

• Covalent (C): Non - metals (P, O) sharing electrons.

i) \( \text{NH}_3 \)

• Covalent (C): Non - metals (N, H) sharing electrons.

j) \( \text{RaBr}_2 \)

• Ionic (I): Metal (Ra) + non - metal (Br).

k) \( \text{NaCl} \)

• Ionic (I): Metal (Na) + non - metal (Cl).

l) \( \text{Cu}_2\text{O} \)

• Ionic (I): Metal (Cu) + non - metal (O).

m) \( \text{NO}_3^ - \)

• Polyatomic (Pi): Charged group of atoms.

n) \( \text{Li}_2\text{CO}_3 \)

• Ionic (I): Metal (Li) + polyatomic ion (\( \text{CO}_3^{2 - } \)).

o) \( \text{Mg(HCO}_3\text{)}_2 \)

• Ionic (I): Metal (Mg) + polyatomic ion (\( \text{HCO}_3^ - \)).

p) \( \text{Na}_2\text{SO}_4 \)

• Ionic (I): Metal (Na) + polyatomic ion (\( \text{SO}_4^{2 - } \)).

q) \( \text{K}_2\text{SO}_3 \)

• Ionic (I): Metal (K) + polyatomic ion (\( \text{SO}_3^{2 - } \)).

r) \( \text{Al(CN)}_3 \)

• Ionic (I): Metal (Al) + polyatomic ion (\( \text{CN}^ - \)).

s) \( (\text{NH}_4)_3\text{PO}_4 \)

• Ionic (I): Polyatomic ion (\( \text{NH}_4^ + \)) + polyatomic ion (\( \text{PO}_4^{3 - } \)).

t) \( \text{CO}_3^{2 - } \)

• Polyatomic (Pi): Charged group of atoms.

Answer:

s:
a) I
b) Pi
c) C
d) I
e) I
f) Pi
g) C
h) C
i) C
j) I
k) I
l) I
m) Pi
n) I
o) I
p) I
q) I
r) I
s) I
t) Pi