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atom
| Term | Definition |
|---|---|
| atom | the basic particle from witch all elements are mad |
| electron | a tiny negatively charged particle that moves around the outside of the nucleus |
| nucleus | in cells a large oval organelle that contains the cells genetic material in the form of DNA and controls many of the cells activites |
| proton | small positively charged particles that are found in the nucleus of an atom |
| energy level | a region of an atom in which electrons of the same energy are likely to be found |
| neutron | a small particle in the nucleus of thee atom with no electrical charge |
| atomic number | the number of protons of an atom |
| isotope | an atom with the same number of protons and a different number of neutrons from other atoms of the same element |
| mass number | the sum of protons and neutrons in the nucleus of an atom |
| metal | a class of elements characterized by physical properties that included shininess malleability ductility and conductivity |
| luster | the way a mineral reflects light from its surface |
| ductile | a term used to describe a material that can be pulled out into a long wire |
| thermal conductivaty | a chemical bond formed when atoms share 3 pairs of elements |
| electrical conductivity | the ability of an object to carry electric current |
| reactivity | the ease and speed with which an element combines or reacts |
| corrosion | |
| alkali metal | an element invgroup 1 of the periodic table |
| alkaline earth metal | an element in group 2 of the periodic table |
| transition metal |
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15cannanmar
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