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25 Cards in this Set
- Front
- Back
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how many known elements?
how many naturally occuring/synthetic? |
-109
-90/19 |
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which elements are radio active?
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all above atomic number 83, bismuth
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ex. of elements named after:
people (3) places (5) gods(2) planets (2 properties (3) |
-99 Einsteinium, 102 Nobelium, 103 lawrencium
-67 Holmium, 97 Berkelium, 98 Californium, 95 Americium, 87 Francium -90 Thorium, 80 mercury -92 uranium, 93 neptunium -35 bromine, 36 krypton, 18 argon |
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>90% of elements are .....at room temp
and most are..... |
solids
metals |
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how many liquids?
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2: mercury and bromine
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how many gases?
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11
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bromine is a ...
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fuming liquid
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iodine (I2) is a
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solid
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elements of earth in order of abundance?
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Fe, O2, Mg, Si, S
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elements of earth's crust in order of abundance?
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O2, Si, Al, Fe, Ca
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elements of atmosphere and their %?
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N2- 72%
O2-21% Ar and others -0.9% |
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elements of universe and their %?
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H2- 91%
He- 9% O2, N2, C and others -0.1% |
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radium?
radon? |
Ra
Rn |
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platinum?
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Pt
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plutonium?
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Pu
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tellurium?
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Te
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tin?
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Sn
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palladium
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Pd
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caesium
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Cs
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cadmium
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Cd
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scandium
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Sc
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titanium
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Ti
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vanadium
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V
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germanium
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Ge
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arsenic
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As
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