Answer
a) Silver, 62 neutrons
b) Tin, 50 protons
c) Molybdenum, 42 electrons
d) Scandium, 21 electrons
Work Step by Step
a) Ag is the atomic symbol for Silver.
To find the number of neutrons for a particular isotope of an atom, you must subtract the atomic number from the atomic mass:
Atomic Number: 47
Atomic Mass: 109
# of Neutrons: 109-47 = 62
b) Sn is the atomic symbol for Tin.
The number of protons is the same as the atomic number.
Atomic Number: 50
# of Protons: 50
c) Mo is the atomic symbol for Molybdenum.
Atoms have equal numbers of electrons and protons. Therefore, the number of electrons is the same as the atomic number.
Atomic Number: 42
# of Electrons: 42
d) Sc is the atomic symbol for Scandium.
Atoms have equal numbers of electrons and protons. Therefore, the number of electrons is the same as the atomic number.
Atomic Number: 21
# of Electrons: 21
