| A | B |
|---|
| electron cloud | the space around the nucleus where electrons travel |
| energy levels | the different areas for an electron in an atom |
| electron dot diagram | symbol for the element surrounded by as many dots as there are electrons in the outer energy level |
| chemcial bond | the force that holds two atoms together |
| ion | an atom that is no longer neutral because it has gained or lost an electron |
| ionic bond | when type of bond formed whenatom gives away an electron |
| compound | pure substance containing two or more elements that are chemically bonded |
| metallic bonds | bond formed when METAL atoms share their pooled electrons |
| covalent bond | the chemical bond that is formed between nonmetal atoms when they share electrons |
| molecule | the neutral particle formed when atoms share electrons |
| polar bond | a bond in which electrons are shared unevenly |
| chemical formula | combination of chemical symbols and numbers that shows which elements are present in a compound and how many atoms of each element are present |
