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23 Cards in this Set
- Front
- Back
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What is the study of matter - what is it made of, what its usual characteristics are, how it reacts to other matter?
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chemistry
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What word means "what scientist think about atoms"?
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atomic theory
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Who developed a simplified model of the atom to help people understand the atom ?
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Niels Bohr
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If the element carbon has 6 protons, how many electrons does it have? Why?
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6; there are the same # of electrons as there are protons
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What are the parts of a periodic cell?
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atomic number
element name chemical symbol atomic mass |
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The horizontal rows of the periodic table are called?
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periods
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What does the chemical formula H2CO3 tell you about the carbonic acid?
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This compound has 2 atoms of hydrogen, one atom of carbon, and 3 atoms of oxygen
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What is a strong acid that can burn the skin?
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corrosive
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What is a substance that changes color when exposed to acid or base solutions?
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indicator
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What is a substance with only one kind of atom
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element
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What is the classification system of elements
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periodic table of the elements
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An atom that gains or loses electrons
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ion
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smallest piece of an element
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atom
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a group of atoms joined together chemically
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molecules
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Parts of an atom include
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neutron
proton electron nucleus |
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Chemistry is the study of
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matter
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The atomic mass is the approximate number of
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protons and neutrons
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The atomic number is based on the number of _______ an element has.
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protons
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Who is the Russian chemist who is responsible for developing a way to organize elements
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Mendeleev
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Compounds are molecules, but molecules are not always found in
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compounds
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acids
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helps digest food in the stomach; sour taste
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bases
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bitter taste; slippery to touch
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salts
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usually composed of a metal and nonmetal
produced with water when an acid and base neutralize each other; chalk |
