Chemistry end of year 9 exam

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Question 1 of 1

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0
433200
0
120
block

1.

Fill in the blanks  

(0/0)



number of protons = number of

because the charges have to cancel out



433201
0
120
none
433202
0
60
none
433238
0
120
none
433239
0
120
none
433240
0
120
none
432860
0
120
none
432871
0
120
none
432873
0
120
none
432879
0
120
none
432880
0
120
none
432881
0
120
none
432882
0
120
none
432883
0
30
none
432884
0
120
none