Answer:
The answer is C... I am almost positive.
D. Polyacrylonitrite
hope i help my bad if i'm wrong
Answer:
A. Isotope
Explanation:
For example you have Carbon 12 with 6 protons and 6 neutrons and Carbon 14 with 6 protons and 8 neutrons.
Answer:
8 electrons
Each principal energy level can contain up to 2n2 electrons, where n is the number of the level. Thus, the first level can contain up to 2 electrons, 2(12) = 2; the second up to 8 electrons, 2(22) = 8; the third up to 18, 2(32) = 18; and so on.
Explanation:
To find the density, the formula would be d= m/V. Your answer would be 19.9 or if you round, 20.