Identify an element that is NOT in its standard state. Choose the one alternative that best completes the statement or answers the question.
A) N2(g)
B) Xe(g)
C) Ca(s)
D) N(g)

Explanation:

Xenon is a gas in its standard state

Calcium is a solid in its standard state

Nitrogen is a gas in its standard state

I am assuming that N2 is a isotope of nitrogen, not sure which but by the process of elimination I think that is the answer

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: