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1
Q

Grundämne

A

alla atomer har samma atomnummer, lika antal protoner. Definierar ämnets egenskaper

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2
Q

Aggregationsformer

A

ämnen kan vara fasta, vätskor eller gaser

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3
Q

isotop

A

nuklider av samma grundämne

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4
Q

elektronkonfiguration

A

anger hur elektronerna i en atom är arrangerade

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5
Q

valenselektroner

A

elektronerna i det yttersta skalet

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6
Q

alkalimetaller

A

grupp 1

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7
Q

alkaliska jordartsmetaller

A

grupp 2

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8
Q

halogener

A

grupp 17

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9
Q

ädelgaser

A

grupp 18

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10
Q

syror

A

protongivare

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11
Q

baser

A

protontagare

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12
Q

kemiska förening

A

innehåller olika grundämnen, atomer med olika atomnummer

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13
Q

Blandning

A

ämnena behåller sina egenskaper.

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14
Q

kemisk reaktion

A

ger nya ämnen, ofta kemiska föreningar

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15
Q

sublimering

A

fast from till gasform

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16
Q

metaller

A

leder elektrisk ström. Hårda, hållfasta och formbara

17
Q

legering

A

homogena blandningar av metaller

18
Q

atom

A

den minsta enheten av ett grundämne

19
Q

atomnummer (Z)

A

antalet protoner i atomkärnan (alltid heltal)

20
Q

Masstal (A)

A

summan av antalet protoner och neutroner i atomkärnan (heltal)

21
Q

salter

A

består av joner som är förenade genom jonbindning

22
Q

Proton

A

positiv kärnpartikel

23
Q

Neutron

A

Neutral kärnpartikel

24
Q

atommassa

A

genomsnitt av ett grundämnes alla isotopers massa