| A | B |
|---|
| The chart showing the classifications of elements according to their properties and increasing atomic numbers is called the | periodic table |
| Elements arranged in verticle colums in the periodic table are called | family |
| Elements arranged in horizontal rows in the periodic table are called | period |
| Nonmental chemicals are ____ conductors of heat and electricty | poor |
| The identity of an element is determined by the number of _____ it has | protons |
| ________tells us that two elements are alike, but have different numbers of the neutrons | isotopes |
| A chemical symbol represents the ____ of an element | name |
| The number of protons in an atom is called the | atomic # |
| The sum of the protons and netrons in an atom is the | mass# |
| The mass of a ____is about equal to the mass of a proton | neutron |
| How does the mass of an electron compare to that of a proton | it is greater |
| The central core of an atom is called the | nucleus |
| A particle that moves around the nucleus is_____ | electron |
| The region around the nucleus occupied by the electrons is called the | electron cloud |
| Each inner level of an atom has maxium number of _____it can hold | eletrons |
