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8th Grade Science #2
Texas TAKS review for 8th Grade Science-periodic table
| Question | Answer |
|---|---|
| matter | anything that has mass and volume |
| element | a pure substance, made of atoms, that cannot be broken down into simpler substances by physical or chemical means |
| Building blocks of matter | elements |
| metalloid | elements that have properties of metals and nonmetals; |
| semiconductors | metalloids |
| location of metalloids on periodic table | Located along the staircase between metals and non metals |
| metals | elements that are usually hard, shiny solids and good conductors of heat and electricity; located to the left of the metalloid staircase |
| most common elements on periodic table | metals |
| noble gases | the nonmetal elements in group 18 of the periodic table that rarely react with other elements |
| outer shells of Noble gases filled with this | electrons |
| Periodic Table of the Elements | an ordered arrangement of the elements into periods and groups according to their atomic number |
| nonmetal | poor conductors of heat and electricity; located to the RIGHT side of the metalloids staircase on PTE. |
| Where are most nonmetals found? | right side of periodic table |
| Only nonmetal NOT found on right side of periodic table | hydrogen |
| period | a horizontal row of elements on the Periodic table arranged by atomic number |
| atomic mass | the sum of protons + neutrons in an atom; the average mass of one atom of an element |
| atomic number | the number of protons in the nucleus of an atom |
Created by:
switt@ccisd.net
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