| Ch. 20 | |
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| They are good conductors of heat and electricity | |
| are elements that usually are gases or brittle solids at room temperature | |
| Which means they can be hammered or rolled into sheets | |
| Consists of two atoms of the atom element in a covalent bond | |
| Which means they can be hammered or rolled into sheets | |
| Which means they can be hammered or rolled into sheets | |
| which are different forms of the same element, have different molecule structures | |
| | Ch. 20 | |
| elements that conduct an electric current under certain conditions | |
| The process of a solid changing directly into a vapor without forming a liquid | |
| Elements having more than 92 protons, which is the atomic number of Uranium | |
| can form ionic and covalent bonds with other elements and can have metallic and nonmetallic properties | |
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| the nucleus breaks down and gives off particles and energy | |
| elements in group 3 through 12 in the periodic table | |
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