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Earth Science Ch 3
| Question | Answer |
|---|---|
| a substance that cannot be broken down into simpler substances by physical or chemical means | element |
| the smallest particle of an element that has all of the characteristics of that element | atom |
| the center of an atom, made up of protons and neutrons | nucleus |
| a particle that has mass and a positive electrical charge | proton |
| a particle with about the same mass as a proton but with no electrical charge | neutron |
| the number of protons in an atom’s nucleus | atomic number |
| the combined number of protons and neutrons in an atom | mass number |
| a particle with little mass and a negative electric charge | electron |
| an area in an atom where an electron is most likely to be found | electron cloud |
| made up of something | consist |
| two more elements that are chemically combined | compound |
| two or more elements joined by covalent bonds | molecule |
| homogeneous mixture whose components cannot be distinguished | solution |
| two atoms share a pair of electrons that hold them together | covalent bond |
| force between two ions with opposite charges | ionic bond |
| firm and stable in shape; not liquid or fluid. | solid |
| a substance that flows freely but is of constant volume, having a consistency like that of water or oil. | liquid |
| a substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape (unlike a solid) and no fixed volume (unlike a liquid). | gas |
| a hot, highly ionized, electrically conducting gas | plasma |
| an atom that gains or loses electrons | ion |
Created by:
ashorten
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