1: hydrogen, H, 75% of the visible universe by weight, 2: helium, He, glows pale peach when an electric current runs through it, 3: lithium, Li, the lightest metal, easily floats on water, 4: beryllium, Be, strong and lightweight, used in missiles and spacecraft, 5: boron, B, in borax but too brittle in its pure form to have practical uses, 6: carbon, C, makes up graphite and diamonds, 7: nitrogen, N, colorless gas that makes up 78% of our atmosphere, 8: oxygen, O, pale blue liquid at -183*C but normally a colorless gas which we need to live,

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