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.

passing a magnet thought the

mixture , because iron gets attracted to magnet .

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.