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Answer Key

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Across
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An element or substance that is not made out of metal.
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Rare gasses, such as, helium ,neon, and argon
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Elements such as lithium, sodium, and potassium
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the area around the atoms nucleus where electrons are most likely found.
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Radiation or particles caused by the spontaneous
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Any set of metallic elements occupying a central block
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a group of radioactive metals that are located in the bottom row of the periodic table
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atoms of a metal element with a different number of neutrons than other atoms of the same element
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stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
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a solid material that is typically hard, shiny, malleable, fusible, and ductile, with good electrical and thermal conductivity (e.g., iron, gold, silver, copper, and aluminum, and alloys such as brass and steel).
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an atom or molecule that has lost one or more electrons, resulting in a net positive charge because it now has more protons than electrons;
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Group, in chemistry, a column in the periodic table of the chemical elements
Down
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An atom or molecule, meaning it has gained or lost electrons, resulting in a net positive or negative electrical charge
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a subatomic particle found in the nucleus of an atom, with no electric charge and a mass slightly greater than a proton
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n element (e.g. arsenic, antimony, or tin) whose properties are intermediate between those of metals and solid nonmetals or semiconductors.
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The same as alkaline metals
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Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation.
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Atomic,mass,unit
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he central part of a cell, atom, or other object that contains genetic material or other important components
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he number of protons in the nucleus of an atom, which determines the chemical properties of an element and its place in the periodic table.
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an atom or molecule that has gained one or more electrons, resulting in a net negative charge because it has more electrons than protons
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any of the series of fifteen metallic elements from lanthanum to lutetium in the periodic table.
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ny of the elements fluorine, chlorine, bromine, iodine, and astatine, occupying group VIIA (17) of the periodic table. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen from which simple salts can be made.
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a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.