Chemistry
The number of d-electrons in Fe2+ (Z = 26) is not equal to that of

s-electrons in Mg(Z = 12)
d-electrons in Fe(Z = 26)
p-electrons in Ne(Z = 10)
p-electrons in CI(Z = 17)

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Chemistry
All isotopes of the same element have ________

Different atomic numbers and different atomic mass
The same atomic number but different atomic masses
The same atomic number and the atomic mass
Different atomic numbers and the same atomic mass

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Chemistry
Antacid tablets consist of

Hydroxides of sodium, magnesium and aluminium
Hydroxides of magnesium and aluminium
Hydroxides of sodium and aluminium
Hydroxides of magnesium and sodium

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