What does the number 84 in the name krypton-84 represent? a) the atomic number
b) the mass number
c) the sum of the protons and electrons
d) twice the number of protons

What must happen before a body cell can begin mitotic cell division

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

In a copper wire, a temperature increase is the result of which of the following