C1 The Periodic Table Flashcards

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1
Q

where are the non-metals on the PT

A

to the right of the stepped line

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2
Q

how do you tell if a metal is metal or non-metal

A

you exaimine its properties

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3
Q

what are the propities of metals

A
good conducter of electricity
good conducter of heat
shiney
high density
malleable
ductile
sonorous
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4
Q

what are the properties of non-metals

A

the opposite of the metal propities

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5
Q

Most metals have high….

A

melting points - they are solid at 20degrees

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6
Q

many non-metals have low….

A

boiling points - they’re gases at 20degrees

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7
Q

what are metalloids

A

elements near the stepped line - their propities are between metals and non-metals

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8
Q

whats a difference between metal oxides and non-metal oxides

A

most metal oxides are solids at 20degrees where non-metal oxides are gases and dissolve in water to from an acidic solution.

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9
Q

what are groups

A

in the PT the vertical columns are called groups - the elements in a group have similar properties.

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10
Q

what happens going down a group

A

melting point increase

boiling points decrease

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11
Q

what is group 1 called

A

alkali metals

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12
Q

what is group 2 called

A

alkali earth metals

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13
Q

what is group 0/8 called

A

noble gases

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14
Q

what does the bottom number in a PT element square mean

A

atomic (proton) number

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15
Q

what does the top number mean in a PT element square

A

relative atomic mass (weight)

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16
Q

what are periods

A

the horizontal rows on the PT - going across a period there are patterns in the propities of the elements.

17
Q

what is strage about the elements in group one

A

they have low melting points but their metals

18
Q

the group one elements are very….

A

reactive - they take part in chemical reactions easily.

19
Q

what do the group one elemnts react with and make

A

they react with water and produce hydrogen gas.

20
Q

what is the pattern in the reactions in group one

A

they produce hydrogen and metal oxide

eg… lithium + water = lithium hydroxide + hydrogen

21
Q

what happens to the reactions as you go down group one

A

they get more vigorous - exciting

22
Q

what are the name of group 7

A

halogens