You do not know an object's velocity until you know its what?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

One does not belong why? ice, gold ,wood ,diamond and table salt

21. consider the following chemical reaction: n2+ o2 2 no if 10.0 g of n2 reacts with excess oxygen then how many grams of no can be formed? a) 10.7 g b) 21.4 g c) 32.9 g d) 42.8 g page 4 of 8