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Across
3.loses energy .....gets colder
5.used to get subscripts
7.end result in a reaction
9.when sodium reacts with lithium oxide
11.will always exist as two
12.heat pack energy
13.used to balance an equation
14.two element with one charge
15.starts a reaction
Down
1.put elements together
2.two compounds reacting
3.uses element and compounds to represent a reaction
4.always have three positive
6.equal number of elements in a reaction
8.compound breaks down into simplier elements
10.small number in a formula

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