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Title: Atoms - isomers
Description: Introduction to the periodic table, overview of the elements and theirphysical and chemical characteristics, isomers
Description: Introduction to the periodic table, overview of the elements and theirphysical and chemical characteristics, isomers
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Atoms: the foundations of life
SI units:
Temperature in Kelvin : T= 0 + 273
...
Volume:
1L = 1 dm3
1m3= 1000 L
Length: http//learn
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utah
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(calculator)
Significant figures
1
...
figs
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4
4sig
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0
...
figs
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234x10`-3
4 sig
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46 + 2
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806
Ans = 27
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When / or *, quote least sig
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0
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15x2
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44933248
Ans= 8
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Periodic Table:
Br and Hg- liquids
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Reactive – Calcium fluride
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5H20
Copper sulfide – Cu2S
118 identified elements
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- Periodicity
18 groups – similar properties
Noble gases – non reactive
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Atomic Composition – Subatomic Particles – protons, neutrons, electrons
Separated particles don’t behave like the element
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Charge of subatomic particles
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Atoms are uncharged
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Atomic number, Z, number of protons (fixed) p=e
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Formation of ions – anions & cations
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Readiness to gain/lose e- dictates reactivity
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Number of neutrons can vary – Don’t affect atom’s charge
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Isotope analysys
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Atomic weight – average mass of an atom of that element
Atomic mass – mass of a single, specific isotope
Title: Atoms - isomers
Description: Introduction to the periodic table, overview of the elements and theirphysical and chemical characteristics, isomers
Description: Introduction to the periodic table, overview of the elements and theirphysical and chemical characteristics, isomers