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28 Cards in this Set
- Front
- Back
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What subatomic particles are found in the nucleus and which are found outside?
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Inside: protons, neutrons
Outside: electrons |
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What subatomic particle has a mas of 1.007?
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Proton
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What subatomic particle has a mas of 1.009?
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Neutron
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What subatomic particle has a mas of 0.0009?
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Electron
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What are the charges of the 3 subatomic particles?
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Proton- 1
Neutron- 0 Electron- -1 |
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Where is the mass of an atom located?
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the number of protons plus the number of neutrons
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Where is the atomic number of an element located?
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the number of protons
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What is an isotope?
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Atoms which have the same number of protons but a different number of neutrons, and therefore a different atomic mass.
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What are ions?
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Elements which have a different number of protons and electrons. (Not neutral).
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What is a cation?
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It is positively charged, and loses one or more electrons. (Metal).
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What is an anion?
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It is negatively charged, and has a gain of one or more electrons.(Nonmetal).
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Atomic weight (mass) is what?
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The weighted average mass of an element's atom (all isotopes).
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an electronically neutral subatomic particle
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neutron
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a law stating that the mass of the substances produced in a reaction equals the mass of the substances produced in a reaction equals the mass of the substances that reacted
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law of conservation of mass
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a positively charged subatomic particle
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proton
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a member of one of the A groups of the elements in the periodic table
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main group element
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the average mass of an atom of an element, taking into account the masses and abundances of all the naturally occurring isotopes
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relative atomic mass
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the sum of the protons and neutrons in an atom
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mass number
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an atom of an element with a specific number of neutrons
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isotope
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an ion with a positive charge
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cation
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any particle found within an atom
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subatomic particle
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any element in group IA (1)
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alkali metal
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a chart of all the known elements ordered by increasing atomic number and arranged in columns and rows to emphasize similar properties
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the periodic table
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explain why the mass of a carbon atom is about twice the mass of the protons in a carbon atom. What accounts for the difference in mass?
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Carbon has 6 protons. The relative atomic mass of a carbon atom is 12.01 amu indicating the presence of 6 neutrons. Protons and neutrons have approximately equal masses so the nuclear mass is approximately two times the mass of the protons.
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what is the atomic number for hydrogen, nitrogen, and mercury?
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1, 7, 80
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the number of which subatomic particle determines the identity of an element?
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protons
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what information do you need to determine the atomic number of an atom?
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the number of protons
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what is always the same for atoms of the same element?
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atomic number
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