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17 Cards in this Set
- Front
- Back
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atom
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is the smallest particle of an element building block of matter.
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atomic number
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the number of protons in a atoms nucleus.
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Bohr diagram
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diagram that shows the number of protons and neutrons in a nucleus that orbit energy levels and electrons.
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chemical symbol
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one or two letter initial that represents the name of an element.
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electrons
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is a negatively charged particle that moves in an orbit shell outside an atoms nucleus.
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energy level
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electrons are found in parts around an atoms nucleus, energy level.
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family
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a vertical column in a periodic table that contains similar element qualities.
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isotope
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atom of the same element that have different numbers of neutrons in their nuclei.
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mass number
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total number of protons and neutrons in a nucleus.
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metalloid
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an element with properties of both metals and nonmetals.
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metal
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any element on the left side of the periodic table except hydrogen; good conductors of electricity.
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neutron
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a particle within an atoms nucleus that had no electrical charge.
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non-metal
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an element that lacks the characteristics of a metal; on the right side of the Periodic Table
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nucleus
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the control center of a cell.
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period
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horizontal column in the Period Table that represents the energy level of an element.
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periodic table
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a table of all of the elements arranged by number and grouped according to similar properties.
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proton
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a positive charged particle in an atoms nucleus
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