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What is 1 + 3?
Chapter 2 Section 1
smallest particle of matter that contains the characteristics of an element
central region of an atom
same mass as neutron, located in nucleus
same mass as protons, located in the nucleus
smallest of three particles in an atom, located on energy levels
outermost energy level
contains 2 or more elements chemically combined in specific proportions
number of protons in the nucleus
total mass, protons+neutrons
atoms with the same number of protons but different number of neutrons
has an electrical charge because of a gain or loss of one or more electrons