Which of the following are elements?
i.KOH
ii.Ne
iii.CO
iv.Carbon tetrachloride
v.Calcium
A)i, ii, and iii
B)iv and v
C)ii and iii
D)ii and v
E)ii, iii, and v

Question

Quizplus · Accepted Answer

Neon (Ne) and Calcium (Ca) are elements. Carbon tetrachloride (CCl4) and KOH (potassium hydroxide) are compounds. CO is a molecule consisting of two different elements (carbon and oxygen). Therefore, the only elements listed are Ne and Ca, so the answer is D, ii and v.

Which of the Following Are Elements