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Science Review
terms and definitions
| Term | Definition |
|---|---|
| proton | a positively charged particle found in the nucleus of the atom |
| neutron | an uncharged particle found in the nucleus of the atom |
| electron | a negatively charged particle found in an electron cloud orbiting around the nucleus of an atom |
| atomic number | number of protons in the nucleus of an atom |
| atomic mass number | protons plus neutrons |
| atomic mass | average mass of all an elements isotopes |
| metals | 1. Malleable 2. Conduct heat well 3. conduct electricity well 4. solids at room temperature 5. they are shiny |
| non metals | 1. not malleable 2. do not conduct heat well 3. do not conduct electricity well 4. they are dull 5. they are gases at room temperature |
| metalloids | have properties of metals and non metals |
| far l | metals |
| far r | non metals |
| middle | metalloids also known as transition metals from sections 3-12 |
| ion | is formed when an atom loses or gains an electron |
| isotope | is an atom of the same element but has a different number of neutrons |
| what are the most reactive groups | 1 and 17 |
| what is the least reactive group | 18- it doesn't like to form any type of ion |
| columns | groups |
| rows | periods |
| alloy | the combination of two or more atoms |
| metalloids | elements that have properties of both metals and non metals |
| reactive | a term that indicates how likely ans element is to undergo a chemical change |
| def. of metal | elements that conduct heat and electricity well |
Created by:
kgupta
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