Chapter 30, Problem 3Q

To determine

Number protons and number neutrons

Answer to Problem 3Q

Solution:

a)Uranium has 92protons and 140 neutrons b)Nitrogen has 7 protons and 11 neutrons c)Hydrogen has 1 proton and 0 neutrons d)Strontium has 38 protons and 48 neutrons and Fermium which has 100 protons and 152 neutrons.

Explanation of Solution

The isotope can be represented in ${}_Z{}^{A}X$ this form.

Where Z is the atomic number, which is the number of protons in the element

A is the mass number, which is the number of protons plus the number of neutrons.

X is the chemical symbol of the element, and it must correspond to the atomic number.

Number neutron is equal to A-Z. from this we can find the proton and neutron

a)${}_{92}{}^{232}X$ here X is Uranium, which has 92protons and 140 neutrons

b)${}_7{}^{18}X$ here X is Nitrogen, which has 7 protons and 11 neutrons

c)${}_1{}^{1}X$ here X is Hydrogen,which has 1 protons and 0 neutrons

d)${}_{38}{}^{86}X$ here X is Strontium, which has 38 protons and 48 neutrons

${}_{100}{}^{252}X$ here X is Fermium which has 100 protons and 152 neutrons