Atomic Structure
- Created by: GreenGooSnake
- Created on: 29-05-19 21:28
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- Atoms - Lesson 5 - Structure of the Atom
- Atoms contain PROTONS, NEUTRONS and ELECTRONS
- Atoms radius = about 0.1 NANOMETERS
- The NUCLEUS
- In the MIDDLE of the atom
- Contains PROTONS and NEUTRONS
- RADIUS = 1 X 10 to the power of -14.
- POSITIVE CHARGE because of the protons
- Almost WHOLE mass is CONCENTRATED in the nucleus
- The ELECTRONS
- Move AROUND it in electron SHELLS
- NEGATIVELY CHARGED and TINY, cover A LOT OF SPACE
- VOLUME of their orbits determines the size of the atom.
- Virtually NO mass
- Number of protons EQUALS number of electrons
- Atoms are NEUTRAL - NO CHARGE overall
- Because they have the SAME NUMBER of PROTONS as ELECTRONS
- CHARGE of electrons is SAME size on the PROTONS but OPPOSITE - so the charges CANCEL OUT
- ATOMIC NUMBER and MASS NUMBER describe an atom
- The NUCLEAR SYMBOL of an atom tells you its ATOMIC(PROTON)NUMBER and MASS NUMBER
- The ATOMIC NUMBER tells you how many PROTONS there are (bottom number)
- MASS NUMBER tells you the TOTAL NUMBER of PROTONS AND NEUTRONS in the atom.
- NEUTRONS = ATOMIC NUMBER - MASS NUMBER
- Atoms contain PROTONS, NEUTRONS and ELECTRONS
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