Calculate the number of protons, electrons, and neutrons in an atom of the element pb with mass number 207 and atomic number 82.

# p=

#e=

# n=

Explanation:

Let be the number of protons.

Let be the number of electrons.

Let be the number of neutrons.

Atomic number is defined as the number of protons in a atom or ion.

Given,atomic number is .

So,

Since the atom is electrically neutral,number of protons and electrons are equal.

So,

The atomic mass is the sum of neutrons and protons.

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explanation: