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The charge of the electron cloud of the element magnesium Mg (Z= 12, A = 24) is::
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
The atomic mass of the element calcium Ca (Z = 20, A = 20) is:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
The charge of a fluorine atom that has 9 protons, 9 electrons and 11 neutrons is:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
The atomic mass of a sodium atom that has 11 protons, 11 electrons and 12 neutrons is:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
The average atomic mass of carbon – 12 and carbon – 14 is:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
Isotopes have:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
The atomic mass of an oxygen atom that has 17 nucleons and 9 neutrons is:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
(Z= 12, A = 23)Mg and (Z =12, A =25)X have the:
12 -
0
40 u
Same nuclear charge
The same number of protons
23 u
17 u
Between 12 u and 14 u
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