Chemistry 2

3. singly occupied with one electron before any one orbital is doubly occupied, and all electrons in singly occupied orbitals have the same spin; the number of unpaired electrons is the maximum possible and these unpaired electrons bonds between atoms
5. a state in which an atom has more energy than it does at its ground state
9. the lowest energy state of a quantized system
10. the principle that states that two particles of a certain class cannot be in exactly the same energy state
12. 6.02x1023 the number of atoms or molecules in 1 mole
13. the ability of an atom in a chemical compound to attract electrons

1. the energy change when an electron is acquired by a neutral atom
2. the energy required to remove an electron from an atom or ion
4. all of the frequencies or wavelengths of electromagnetic radiation
6. the arrangement of electrons in an atom
7. a unit or quantum of light; particle of electromagnetic radiation
8. the SI base unit to measure the amount of the substance
11. a region in an atom where there is a high probability of finding electrons