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32 Cards in this Set
- Front
- Back
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What is the charge of an electron? |
negative |
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Atoms are mostly made of _______ _______. |
empty space |
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Where are electron located? |
electron cloud |
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This is what it's called when an atom has a different number of electrons than it does protons? |
ions |
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How many atoms are in Pb(SO4)? |
6 |
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How many atoms are in 4Zn(Cn)2 |
20 |
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If I have 20 grams of Mercury and 5 grams of Mercury, which will be liquid at room temperature? |
both |
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what is the product in the chemical equation? |
2H2 + O2 ----------> 2H2O |
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This produces new substances that have different properties from those of the original substances. |
chemical change |
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Which of the following is not a sign of a chemical reaction? |
Changing size |
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What is the first step to the scientific method |
identify the problem |
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What is the last step to the scientific method? |
draw a conclusion |
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what means to look for trend or pattern in data? |
Analyze |
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This is the amount of space an object takes up |
volume |
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this means to test a hypothesis |
experiment |
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The Law of Conservation of Mass states that the number of atoms on each side of a chemical equation must be _____ |
equal |
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What is the name of Group 1? |
alkahi metals |
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Matter that has definite volume, definite shape, and the paritcles that vibrate but do not switch positions is called what? |
solid |
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Matter that has no definite shape or volume and the particles move around freely to fill whatever container it is in is called what? |
gas |
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Matter that has no definite shape, has a denfinite volume and particles switch postions and move around is called what? |
liquid |
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Matter that has the most energy and its the most common form of matte4r in the universe is what? |
lasma |
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Dependent variable |
the one being measured |
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observing |
using one or more of your senses to get information |
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independent variable |
the one that is changed |
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Marie Carie |
helped discover radiation |
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Democritus |
first person to form a model |
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The most commonly use model today |
Bohr |
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Rutherford |
figured out that most of the atom is empty space |
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Thompson |
discovered elements |
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Dalton |
formed his model after collecting data on the behavior of gases |
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Einstein |
helped in the creation of the atomic bond |
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hey |
