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10
×
During chemical reaction, oxygen atom can ............... or ........... two electrons.
gain , share with
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×
baam
Lose 10 points!
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×
rocket
Go to first place!
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×
shark
Other team loses 20 points!
Okay!
×
baam
Lose 15 points!
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10
×
.......................... is a formula that represents the number and the type of the atoms in a molecule.
Chemical formula
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10
×
..................... is a set of different elements joined together and behave like one atom during the chemical reaction.
Atomic group
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10
×
The valency of ferric is ..................., while that of ferrous is .................
trivalent , divalent
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10
×
The table salt molecule is formed from combination of ............... positive ion and .............. negative ion.
sodium , chloride
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