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Isotope
2 or more atoms of the same element that have different amounts of neutrons
Ion
2 or more atoms of the same element that have different amounts of electrons

What is A, Z, X, and Y?
A - Mass number
Z - Atomic number
X - Element symbol
Y - Charge

Correct symbol for X?
Ag

Neutrons? (Hint: subtract)
61

Electrons? (Hint: Subtract)
46

This isotope has how many protons, neutrons, and electrons?
Protons: 50
Neutrons: 69
Electrons: 48

Element symbol for X?
Br