Vocabulary Chapter 4 Vocabulary

2. number the sum of the numbers of protons and neutrons present in the nucleus of an atom
3. one of the three subatomic particles that make up an atom
5. describes the possibility of placing electrons within an atom by describing the principal energy level, energy level, orbital (arbitrary level), and spin of
8. a subatomic particle with a positive electric charge
9. depicts the electrons as negatively-charged particles embedded in a sea of positive charge
12. mass, the quantity of matter contained in an atom of an element
13. particle that has a negative charge of electricity and travels around the nucleus of an atom
14. an ion, or charged particle, with a positive charge
15. the property of subatomic particles that causes it to experience a force when placed in an electromagnetic field
16. fixed distances from the nucleus of an atom where electrons may be found

1. the field of physics that explains how extremely small objects simultaneously have the characteristics of both particles (tiny pieces of matter) and waves (a disturbance or variation that transfers energy)
4. atoms with the same number of protons and electrons, but a different number of neutrons
6. number the number of a chemical element in the periodic system and on the periodic table that equals the number of protons in the nucleus of the atom
7. electrons (negatively charged) revolve around the positively charged nucleus in a definite circular path called orbits or shells
10. an atom or group of atoms that carries a positive or negative electric charge as a result of having lost or gained one or more electrons
11. positively-charged nucleus, around which much lighter, negatively-charged electrons circulate, much like planets in the Solar system
12. ions that are negatively charged