Assignment:
Question 1. An atom of the isotope sulfur - 31 consists of how many protons, neutrons, and electrons, (p = proton, e = electron, n = neutron):
15 p, 16 n, 15 e
16 p, 15 n, 16 e
16 p, 31 n, 16 e
32 p, 31 n, 32 e
16 p, 16 n, 15 e
Question 2. An exothermic reaction causes the surroundings to:
warm up
become acidic
expand
decrease its temperature
release CO2
Question 3. Which is the formula for the binary compound of potassium and nitrogen?
KN
K2N
NK2
K3N
NK3
Question 4. How many mL is 0.005 L?
0.000005
0.5
5
50