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10
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During the chemical reaction, sodium loses ............. electron(s) and changes into ........... ion.
one , positive
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10
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The outermost energy levels of ..................... contain 5 , 6 or 7 electrons.
non-metals
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10
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The atom which lost an electron or more during the chemical reaction is .............
positive ion
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10
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The atom which gained an electron or more during the chemical reaction is .............
negative ion
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10
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Elements can be classified according to their properties and electronic structure into ........... , ............. and ................
metals , non-metals , noble gases
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monster
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star
Double points!
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fairy
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5
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15
20
25
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thief
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5
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15
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25
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