The atomic mass of an element whose atoms consist of eight protons, nine neutrons, and eight electrons is
8
16
17
25

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

What will most likely happen when two bromine atoms bond together?

Classify this reaction: 2al+n2-> aln.