Fundamental Ideas
- Created by: ukgamer321
- Created on: 03-05-14 16:26
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- Fundamental ideas
- The Atom
- Electrons (negative) circle around. Relative mass=almost 0
- protons (positive) found in the nucleus. Relative mass=1
- number of protons = number of electrons
- Electrons (negative) circle around. Relative mass=almost 0
- number of protons = number of electrons
- neutrons (neutral) found in nucleus. Relative mass=1
- The atom is always neutral because the electrons and protons cancel each other out
- Nucleus is always positive because protons have a positive
- 7
- Mass number- number of neutrons and Protons
- Electron Configurations
- Shell 1 holds 2 electrons
- when shells are full, element is very stable
- Sodium-
- E- config- 2, 8, 1
- 23
- Na
- 11
- Na
- Metal+water= metal hydroxide+ hydrogen
- Group 1 metals are the most reactive because they only have one outer electron on the outer shell so it's easier to lose and make it stable
- Ions
- metal ion is formed when it loses an electron from the outer shell in order to be stable.
- non metal ion is formed when it gains an electron to become stable
- Ionic Bonding
- eg sodium gives its outer electron away to become Na+
- chlorine picks up the electron and becomes Cl-
- eg sodium gives its outer electron away to become Na+
- The Atom
- Li
- element
- 3
- Atomic Number- number of protons (also number of electrons)
- 7
- Mass number- number of neutrons and Protons
- 3
- Atomic Number- number of protons (also number of electrons)
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