front 1 Atom | back 1 basic building block of chemistry. |
front 2 proton | back 2 inside the nucleus with a positive charge. |
front 3 neutron | back 3 inside the nebulas with neutral charge |
front 4 electrons | back 4 orbit the nebulas with an negative charge. |
front 5 atomic number | back 5 the number that places an atom on the periodic table of elements. |
front 6 atomic mass | back 6 the average mass of atoms inside of an element. |
front 7 atomic nuculas | back 7 Dence central part of an atom. |
front 8 isotops | back 8 two or more forms of a same element that contain equal numbers of protons but different numbers of neutrons in their nuclei |