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Chemistry review

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Across
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Small number in a chemical formula that indicates the number of that particular element
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Is melting a physical or chemical change?
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Element with atom number 54
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Type of element found on the right side of the zig zag line on the periodic table
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The ______ says that most elements want to have 8 valence electrons
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Ring around the nucleus where electrons are likely to be found
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Phase of matter with the least amount of kinetic energy
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Type of element found on the left side of the zig zag line on the periodic table
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Two or more atoms attached with chemical bonds
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Center of the atom where protons and neutrons are found
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Number of every levels in tin
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Tells you the number of protons in an atom
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Type of element found touching the zig zag line on the periodic table
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Substances at the start of a chemical reaction
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Positive subatomic particle
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Vertical column on the periodic table
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Part of the atom used to form chemical bonds
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Equal to protons+neutrons
Down
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Another word for trait or characteristic
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Type of property that can only be observed by changing the substance into something new
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Phase change that occurs when gases lose energy
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Electrons are found in the electron ________
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Phase change from a solid to a liquid
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Scientist who created an early periodic table and used it to predict unknown elements
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Substances at the end of a chemical reaction
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Charge of a neutron
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Horizontal row on the periodic table
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Type of bond formed when atoms share electrons
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Number of valence electrons in helium