Question

1. choose the best answer.

what is the formula for the covalent compound astatine tribromide?
atbr₆
atbr₃
abr₂
atb₃

1. choose the best answer.

what is the formula for the covalent compound hexaboron silicide?
b₆si
b₆s
bsi
b₇si

Explanation:

Question 7

For covalent compounds, the prefixes in the name indicate the number of atoms. "Astatine" is At, "tribromide" means 3 bromine (Br) atoms. So the formula should be AtBr₃.

In covalent compound naming, "hexaboron" means 6 boron (B) atoms, and "silicide" refers to silicon (Si). So the formula is B₆Si.

Answer:

B. AtBr₃

Question 8