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Chemistry review

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