Answer:
Keq: [SO3][NO] /[SO2]NO2]
Explanation:
A or B but i'm leaning more towards A
B, As only are metalloids or have semimetallic properties.
Answer:
Any substance that cannot be decomposed into simpler substances by ordinary chemical processes.
Another definition:
An element is the simplest pure substance which can neither be split nor built up from other simpler substances by chemical reaction
