Chemistry Sapling Learning

Question

A Se atom has a mass number of 75. Determine the number of neutrons, protons, electrons in this neutral isotope.

# of Neutrons:

# of Protons

# of Electrons

Answer 1

Mass number Se = 75

# of Neutrons = 75 - 34 = 41

# of Protons = 34

# of Electrons = 34

Answer 2

The number of protons and electrons is equal to the atomic number, which can be found on the periodic table.

The number of neutrons = difference between mass number and atomic number.