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Holt Chem of Life 1
Chemistry of Life first half terms - BE SURE TO TRY TARGETS!
| Question | Answer |
|---|---|
| chemistry | the study of matter and the changes that take place within matter |
| particle | an organized piece of matter that is a small piece of something larger |
| molecule | the smallest piece of a compound |
| compound | a pure substance made from atoms of two or more types of elements chemically combined |
| atom | the smallest piece of an element |
| element | a pure substance made of only one type of atom |
| subatomic particle | the building-blocks of atoms |
| nucleus | the center of an atom, made of protons and neutrons |
| proton | part of the nucleus of an atom that has a positive charge |
| electron | part of an atom “orbiting” the nucleus, it has a negative charge |
| periodic table of elements | organized display of chemical elements telling useful information about each element |
| atomic number | the number of protons in an element (and the normal number of electrons) |
| chemical symbol | the short-hand abbreviation of an element |
| chemical name | the full name of an element |
| atomic weight | the mass of one mole of an element, equal to the total number of protons plus neutrons in one atom |
| mole | a very large number: 6.02 x 1023, which is used to count very small things such as atoms and molecules |
Created by:
wholt
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