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Definition
| The smallest particle of an element that retains its identity in a chemical reaction. |
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| The weighted average mass of the atoms in a natural occurring sample of an element |
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Definition
| One twelve of a carbon-12 atom. |
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Definition
| The number of protons in the nucleus of an atom of that element. |
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Definition
| A glowing beam that traveled from the Cathode disk to the Anode disk. |
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Term
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Definition
1. All elements are composed of tiny invisible particles called atoms.
2. Aroms of the same element are identicle. The atoms of any one element are different from those of any other element.
3. Atoms of different elements can phisically mix together or can chemically combine in simple whole-number ratios to form compounds.
4. Chemical reactions occur when atoms are seperated, joined, or rearranged. Aroms of one element, however never changed into atoms of another element as a result of chemical reaction. |
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Definition
| Negatively charged subatomic particles. |
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| The vertical columns of the periodic table. |
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Definition
| Atoms that have the same number of protons but different number of neutrons. |
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Definition
| The total number of protons and neutrons in an atom. |
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Definition
| Subatomic particles with no charge but with a mass nearly equal of that of a proton. |
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Definition
| The tiny central core of an atom and is composed of protons and neutrons. |
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Definition
| The horizantal rows of the periodic table. |
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Definition
| An arrangement of elements in which the elements are seperated into groups based on a set of repeating properties. |
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Definition
| Positively charged subatomic particals. |
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