electrons
- Created by: sophnashhh_x
- Created on: 29-04-14 20:00
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- Electrons
- The number of electrons in an atom is the same as the number of protons in the nucleus.
- The electrons are arranged in shells around the nucleus.
- the first shell holds 2 electrons, and the rest can hold 8.
- elements in the same group of the periodic table have the same number of electron in their outer shell
- the number of shells tells us what period an element is in. the number of electrons on the outer shell tells us what group it is in.
- elements with the same number of electrons in their outer shell react in a similar way.
- electrons always fill the lowest energy shell available.
- The number of electrons in an atom is the same as the number of protons in the nucleus.
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