Provide the symbol of the isotopes given below:

(a) Z = 72 and A = 174

(b) Z = 42 and A = 98

Determine the heavier atom between ¹⁴C and ¹⁴N by comparing the total masses of their subatomic particles.

Two nuclides are isotones if they have the same number of neutrons but have a different number of protons.  Identify four isotone symbols for ²³³Pa

Identify the symbols for the isotopes below in the X-A notation (eg. B-10)

a. argon isotope with 21 neutrons

b. uranium isotope with 231 neutrons

c. nitrogen with 7 neutrons

d. bromine with 45 neutrons

Ra-226 occurs when U-238 undergoes radioactive decay. Determine the number of protons, electrons, and neutrons in Ra-226.