Chemistry Review

3. The _____ is a negatively charged ion
5. The number of protons is the same as the ______ number
6. Atoms are made up of mostly _____ space
7. To make ions, _________ are changed
9. This subatomic particle has no mass: the ________
11. Variations on the structure of an atom for a specific element: ________
13. The vertical columns of elects on the periodic table are called ______
17. The atomic ______ is one-half the distance between the center of identical atoms that are not bonded together
18. __________ energy is the amount of energy needed to remove an electron from an atom
19. The electron cloud is divided into ______ levels

1. The _____ radius is the distance from the center of an ion’s nucleus to its outermost electron
2. There are two regions of an atom: the nucleus, and the electron _____
4. The _______ has the most mass of an atom
7. _________________ is the tendency of an atom to attract electrons in the formation of an ionic bond
8. The number of electrons equals the number of _______
10. The total mass of the protons & neutrons in an atom is the atomic ____
12. To make isotopes, ________ are changed
14. Electron ________ is the energy change that occurs when an electron is acquired by a neutral atom
15. The horizontal rows of elements on the periodic table are called _______
16. The ______ is a positively charged ion