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Chem Unit 1
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- 1ATOMThe smallest type of matter.
Building Block of the universe! - 2Alpha ParticlesAn atom with two protons and two neutrons.
- 3Electrostatic AttractionA force that pulls particles together when they have an opposite charge.
Eg, proton+neutron - 4Electrostatic RepulsionA force that pushes particles apart when they have the same charge.
Eg, Proton+Proton, Neutron+Neutron - 5Strong Nuclear ForcesAn attractive force that exists between particles in the nucleus. Short range.
Only acts on particles in close range. - 6IsotopeA form of any element where a neutron is gained or lost.
- 7Relative Atomic MassThe ratio of the average mass per atom of the naturally occurring form of the element.
- 8AllotropesThese are different physical forms of an element.
Eg, Carbon- diamond, graphite, charcoal. - 9Excited StateWhen an electron is in a higher energy level than the ground state due to an absorption of energy.
- 10Ground StateWhen all electrons of an element are in their lowest possible energy levels.
- 11Ionisation EnergyMinimum energy required to remove a valence electron.
- 12ElectronegativityThe ability to attract and form bonds with an electron.
- 13Electron AffinityThe ability to accept an electron to form a negative ion.
- 14How can you find out what elements are in a sample?Spectroscopy.
Every Element has its own wavelength. We can measure this using a spectrometer - 15What maximum capacity of subshells?1s^2 2s^2
2p^6
3s^2 3p^6
4s^2
3d^10 4p^6
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- Fichas sobre Chem Unit 1, creado por S W el 13/02/2018.
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- S W
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