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Chemistry Review

Hannah and Yari

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Across
3.negatively charged ions
8.A + B -> A B
11.a subatomic particle with no charge
14.Fe :
15.sodium, iron, oxygen, lead
18.a positively charged subatomic particle
20.the outtermost electrons in an atom
21.a negatively charged subatomic particle
22.when CO2 and H2O are the products
23.a substance formed in a chemical reaction
Down
1.atoms or groups of atoms with a charge
2.AB -> A+B
4.the central portion of an atom
5.the outtermost level with electrons on it
6.high melting point, electrolytes, hard, brittle,crystal
7.the orgainization of elements
8.a single element replaces another element in a compound
9.low melting point, non-electrolytes, soft powders
10.Atoms become "happy" when this rule is in place
12.AB + CD -> CB + AD
13.bonds that make other atoms "happy"
16.the smallest particle of an atom
17.positively charged ions
18.mmHg or atm
19.a starting substance in a chemical reaction

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