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atoms
chemistry
Term | Definition |
---|---|
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 |