Across
- 3. is a notation of one or two letters representing a chemical element.
- 4. range from groups IIIB to XIIB on the periodic table.
- 6. energy is the amount of energy required to remove an electron from an atom creating a positvely charged ion.
- 7. atoms usually but not always representing more than one element.
- 8. a substance composed of atoms with identical atomic number.
- 10. is the numerical layout of electrons in the orbitals around the atom.
Down
- 1. a substance made of two or more elements that have bonded chemically.
- 2. comprise elements 89 through 103.
- 5. may be either stable or unstable.
- 9. is a measure of the attraction an atom has for electrons.