Explanation:
Given parameters:
Atomic number = 82
Mass number = 207
Unknown:
Number of protons = ?
Number of neutrons = ?
Number of electrons = ?
Solution:
An atom is made up of some particles:
Protons are the positively charged particles
Electrons are negatively charged
Neutrons carry no charge
The atom is made up of dense and massive nucleus consisting of protons and neutrons.
The outer space is occupied by the electrons
The mass number is the number of protons and neutrons in an atom
Atomic number is number of protons
Number of protons = Atomic number = 82
Since the atom is a neutral atom, the number of protons is the same as the number of electrons and this is 82
The number of neutrons is the difference between mass and atomic number:
neutrons = 207 - 82 = 125
Learn more:
Atoms https://brainly.com/question/4670413
#learnwithBrainly
