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26 Cards in this Set
- Front
- Back
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on the periodic table 1A is |
alkili metals |
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on the periodic table 2A is |
alkaline metals |
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on the periodic table 7A is |
halogens |
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on the periodic table 8A is |
nobile gases |
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electrons have a _________ charge |
-1 |
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protons have a ____________ charge |
+1 |
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neutrons have a __________ charge |
0 |
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how do you get atomic mass |
protons+ neutrons |
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the atomic number is |
the number of protons |
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the atomic mass is the ________ of all masses of that element |
average |
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_______ contains two or more different types of atoms |
compound |
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what is a negative ion |
anion |
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what is a positive ion |
cation |
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group 1A form_________ |
1+ions |
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group 2A form __________ |
2+ions |
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group 6A form________ |
2- ions |
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group 7A form_______ |
1- ions |
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what is chemistry? |
science that describes the properties, composition, structure, and reactions of matter |
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what is matter? |
anything that has mass and occupies space |
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what is precision |
the degree of reproducibility |
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what is accuracy? |
how close your measurement is to the true value |
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leading zeros are __________ |
never significant |
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following zeros are__________ |
significant |
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substances to the left of the arrow in an equation are __________ |
reactants |
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substances to the right of that arrow in an equation are_________ |
products |
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mass can neither be created or destroyed |
law of conservation of mass |
