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Chemistry Vocab.
science Kevern academic 3
| Term | Definition |
|---|---|
| element | made of one kind of atom. It can't be broken down during a chemical reaction. It combines with other elements to form compounds. |
| symbol | the abbreviation for the element. Always a capital letter, or a capital and a lower case. |
| atomic mass | decimal number below the symbol. It is the mass of the protons and neutrons in an element |
| atomic number | located above the symbol,tells the number of protons in the nucleus of an atom. |
| group | vertical column of elements on the periodic tables. These element have similar properties. |
| period | elements in a horizontal line on the periodic table. These elements all have the same number of electron levels (valence) |
| mass number | number of protons and neutrons in the nucleus of an atom. It is the atomic mass rounded to the nearest whole number |
| to determine the number of protons..... | look at the atomic number |
| to determine the number of electrons.... | look at the atomic number |
| to determine the number of neutrons.... | take the atomic mass, and round to the nearest whole number . This gives you the mass number. Take the mass number and subtract the atomic number. |
| C | carbon |
| F | flourine |
| Na | sodium |
| Mg | Magnesium |
| Si | silicon |
| P | phosphorus |
| S | sulfur |
| Cl | chlorine |
| K | potassium |
| Ca | clacium |
| Ti | titanium |
| Fe | iron |
| Cu | copper |
| Ag | silver |
| Sn | tin |
| Xe | xenon |
| Pt | platinum |
| Au | gold |
| Pb | lead |
| Pu | plutonium |