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Atoms 10.23.09
Chemistry
Question | Answer |
---|---|
Atom | The smallest unit of matter.-has all the chemical characteristics of an element.-cannot be seen with a microscope. |
Scientific Model | An idea that allows us to create explanation of how we think some part of the world works. Similar to theory. |
Scientific Evidence | When the model is accepted by the scientific community. |
Atomic Number | Number of protons in the nucleus of an atom.-Number of protons is equal to the number of electrons. |
Mass Number | Number of protons plus the number of neutrons. |
Atomic Mass | The weight of a single atom. The same mass number, because most of the weight of an atom is found in the nucleus- electrons weight almost nothing. |