7A, they are unstable, because they don't have balance number inside the protons.
Group 3 of the periodic table contains many of the radioactive elements.
Fluorine is the most electro negative element on the periodic table
In general, the elements with higher atomic numbers are the most radioactive and they are found at the bottom of the Periodic Table of Elements
The seventh most abundent element is potassium.
Am stands for Americium in periodic table. It has got mass number of 95. It has got atomic mass of 243. It is a radioactive element. The half life of it's most stable isotope Am 243 is 7,370 years.
Yes, fluorine is the most reactive element on the periodic table.
Hu stands for Hugium, and is the element with the most mass on the alien periodic table.
This element is francium in the first group of periodic table.
Fluorine
Francium
Ununoctium
carbon