Eugenio 4.11 Key Ideas
- Created by: ganguiano
- Created on: 17-02-19 23:35
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- 4.11 Key ideas
- 1 matter is composed of tiny particles called atoms and there are about 100 different naturally occurring types of atoms called elements
- 2 elements show periodic relationships in their chemical and physical properties
- 3 these periodic properties can be explained in terms of the atomic structure of the elements
- 4 atoms bond by either transferring electrons from one atom to another or by sharing electrons
- 5 the shapes of molecules (groups of atoms bonded together) and the way giant structures are arranged is of great importance in terms of the way they behave
- 6 there are barriers to reaction so reactions occur at different rates
- 7 chemical reactions take place in only three different ways:
- proton transfer
- electron transfer
- electron sharing
- 8 energy is conserved in chemical reactions so can therefore be neither created or destroyed.
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