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atom is the smallest particle that still can be considered an element
electrons a particle that is on the outside part of the atom that has a negative charge
nucleus in cells a large oval organelle that contains the cells genetic material in the form of dna and controls may cells activities.
proton small positivly re found in the nucleus of an atom
energy level a region of an atom in which electrons of the same energy sre likely to be found
neutron a small particle in the nucleus that has no charge
atomic number the number of protons in a atom
isotope an atom with the same number of and different number of neutrons from other atoms of the same element
mass number the sum of protons and neutrons in the nucleus of the atom
Created by: kaylyn100101