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Chemistry Unit 2/3

Across
An atom or molecule with a net electric charge due to the loss or gain of one or more electrons
S,P,D,F
Sum of protons and neutrons in the nucleus of an atom
A measure of the warmth or coldness of an object or substance
Cannot be decomposed into simpler substances by ordinary chemical means
Plot or graph wherein a substance is subjected to increasing temperature
The number of protons in the nucleus of the atom
State in which electrons have absorbed energy and rose to a higher energy level
Equal to the number of protons in a neutral atom
State where all electrons are at their lowest possible energy level
Nuclear decay in which can be blocked by paper or skin
Down
Most of the mass of an atom is here
Mass number minus atomic number
Electron in the outermost principle energy level
The positive charged particle found in the nucleus
Heat required to raise temperature
The smallest particle of an element that can enter into chemical change
Measurement of heat
The condition or quality of being hot
Atoms with the same atomic number but different atomic masses