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27 Cards in this Set
- Front
- Back
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Chemistry 1 |
The study of matter |
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Matter |
A substance that has mass and occupies space |
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Substance |
Any material all samples of which have the same composition and properties. |
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Atom |
The smallest unit of an element that still remains the properties of the element. |
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Atoms contain 3 types of subatomic particles: |
Protons, neutrons, electrons |
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Protons |
Carry a postive charge and found in the nucleus of an atom |
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Neutron |
Are neutral and found in nucleus |
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Electrons |
Carry negative charge and found outside the nucleus and arranged according to their energy level |
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Element |
Identified by its symbol and it's atomic number |
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Atomic number |
Equal to the number of protons found in the nucleus of each of its atoms |
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Nucleons |
Protons and neutrons |
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Mass number |
Equal to the number of nucleons |
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How to find number of neutrons |
Atomic number from mass number |
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Isotopes |
Atoms of the same elements to that contain a different number of neutrons |
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Atomic mass |
A weighted average of the mass numbers of all naturally occurring isotopes of the element |
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Ions |
Charged atoms |
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When does an atom carry a charge? |
When the number of electrons does not equal the number of protons |
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Cation |
Ion with postive charge |
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Anion. |
Ion with negative charge |
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Electrons are found at different energy levels of an atom |
True |
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Valence electrons |
Electrons found in outermost energy layer |
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Horizontal rows on periodic table |
Periods |
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Columns on periodic table are called |
Groups |
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Left handed side of periodic table |
Metals |
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Middle of periodic table |
Metalloids |
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Right side of periodic table |
Non metals |
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Last group on rights side of periodic table |
Noble gases |
