click below
click below
Normal Size Small Size show me how
Atoms and Compounds
test knowledge of matter
| Term | Definition |
|---|---|
| proton | located in the center of the atom and has a positive charge |
| electron | smallest particle of an atom, located outside of the nucleus |
| neutron | an uncharged particle in the nucleus of an atom |
| atom | the smallest part of an element that all matter is made of |
| nucleus | the center part of an atom |
| protons and neutrons | located in the center of the atom; gives the atom its mass |
| atomic mass | protons and neutrons in the nucleus |
| atomic number | determines what type of element it is; the number of protons in an atom |
| physical change | a change in shape, size, color,phase but not in chemical make-up |
| chemical change | new substances are formed with new properties because atoms break their bonds |
| chemical bond | a strong electrical force between two atoms |
| compound | when 2 or more atoms of elements interact or combine |
| The Periodic Table of Elements is arranged by increasing... | atomic number |
| chemical symbols | Elements are represented by one, two, or three letters |
| matter | anything that has mass and takes up space |
| molecule | two or more atoms chemically bonded |