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

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer