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1. 
Geef A,Z,N en het aantal elektronen voor 23-Na.
A.
Z = 11, A = 23, N = 12, e = 11
B.
Z = 23, A = 11, N = 12, e = 11
C.
Z = 11, A = 23, N = 11, e = 12
D.
Z = 23, A = 12, N = 11, e = 12
2. 
Geef A,Z,N en het aantal elektronen voor koolstof.
A.
A= 12, Z = 6, N = 6, e = 6
B.
A = 6, Z = 12, N = 12, e = 6
C.
A = 12, Z = 6, N = 12, e = 12
D.
A = 6, Z = 6, N = 12, e = 12
3. 
Geef A,Z,N en het aantal elektronen voor helium.
A.
A = 2, Z = 4, N = 4, e = 6
B.
A = 4, Z = 2, N = 2, e = 2
C.
A = 1, Z = 1, N = 1, e = 1
D.
A = 1, Z = 1, N = 0, e = 1
4. 
Geef A,Z,N en het aantal elektronen voor Chloor.
A.
A = 17, Z = 35, N = 17, e = 35
B.
A = 17, Z = 35, N = 18, e = 17
C.
A = 6, Z = 12, N = 6, e = 6
D.
A = 6, Z = 6, N = 12, e = 12
5. 
Geef A,Z,N en het aantal elektronen voor ijzer.
A.
Z = 56, A = 26, N = 30, e = 26
B.
Z = 26, A = 56, N = 30, e = 26
C.
Z = 26, A = 13, N = 13, e = 13
D.
Z = 13, A = 26, N = 13, e = 13
6. 
Geef A,Z,N en het aantal elektronen voor zuurstof.
A.
Z = 8, A = 16, N = 16, e = 16
B.
Z = 8, A = 16, N = 8, e = 8
C.
Z = 16, A = 8, N = 16, e = 16
D.
Z = 16, A = 8, N = 8, e = 8