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22 Cards in this Set
- Front
- Back
- 3rd side (hint)
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The center of an atom is called the
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nucleus
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_____ and ______ make up the nucleus of an atom.
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protons and neutrons
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_____ orbit around the nucleus of an atom in layers or _____.
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Electrons, shells.
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Protons have a _____ charge.
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positive
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Electrons have a _____ charge.
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negative
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Neutrons have _____ charge
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no or neutral
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An element is a type of matter made up of only _____ type of _____.
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one, atom.
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The atoms of an element are basically _____, though the number of _____ may vary.
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alike, neutrons
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How is a hydrogen element different from a helium element?
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They differ in the number of protons in the atom. Hydrogen atoms have one proton, and helium atoms have two protons.
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The atoms of one element differ from those of another element in the number of _____.
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protons
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Elements are represented with _____ _______.
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chemical symbols
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What are the chemical symbols for oxygen, carbon, helium, and lead?
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O, C, He, and Pb.
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Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):
O2 |
two oxygen atoms
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Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):
CaCO3 |
one calcium, one carbon, three oxygen atoms, which form calcium carbonate together.
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Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):
NaCl |
one sodium atom and one chlorine atom, which for sodium chloride or table salt together.
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Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):
H2O |
two hydrogen atoms and one oxygen atom, which for water together.
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Explain the name and number of each element in the following molecule or compound (pretend the numbers are subscripts):
CO2 |
one carbon and two oxygen atoms, which for carbon dioxide together.
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Compounds are represented by _____ _____.
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chemical formulas.
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If a chemical symbol in a chemical formula doesn't have a number to the right of it, you can assume
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there is only one.
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Be able to explain what is happening in this chemical equation which models the chemical change of combustion
CH4 + 2 O2 = CO2 + 2 H2O. |
one methane molecule combined with two oxygen molecules burn to make one carbon dioxide molecule and two water molecules.
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one methane molecule combined with two oxygen molecules equals...
you finish. |
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Name some of the predominant elements found in the atmosphere.
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oxygen, nitrogen, carbon
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Name some of the prodominant elements found in the oceans.
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sodium, hydrogen, oxygen, potassium.
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