| Flap 1 |
Flap 2 |
| matter |
anything that has mass and takes up space |
| mass |
a measure of the amount of matter in an object |
| element |
a substance that can not be broken down into simpler substances by chemical means. |
| atom |
the smallest particle of an element that maintains all the properties of that element |
| nucleus |
the center of an atom containing neutrons and protons |
| proton |
positively charged particle in the nucleus of an atom |
| neutron |
particle in the nucleus of an atom having no charge |
| atomic number |
number of protons in an atom |
| mass number |
'weight' of an atom-mostly of the nucleus |
| electron |
negatively charged particle outside the nucleus of an atom |
| orbital |
a region in an atom where electrons will be found |
| isotope |
an atom that has the same number of protons but different amounts of neutrons |
| compound |
a substance made up of atoms of two or more different elements |
| chemical bond |
the attractive force that holds atoms or ions together |
| covalent bond |
a bond where atoms share electrons |
| molecule |
a group of atoms that are held together by chemical forces. |
| ion |
an atom or radical that has gained or lost electrons and has a charge |
| ionic bond |
the bond between two atoms of opposite charge |
