Why do stable nuclei have more neutrons than protons?

Why do stable nuclei never have more protons than neutrons?

Which of the following has more electrons than neutrons? (Mass number of Al, C, O and F is 27, 12, 16 and 19 respectively)

An ion with mass number 56 contains 3 units of positive charge and 30.4% more neutrons than electrons. Assign the symbols to this ion.

Why do the veins have valves?

The sum of the number of neutrons and protons in an isotope of hydrogen is

A molecule in which centre of gravity of positive nuclei and revolving electrons do not coincide is

Why do molluscs have shells?

Why do molluscs have shells?

An element with mass number 81 contains 31.7% more neutrons as compared to protons. Assign the atomic symbol.

Why do slim persons feel more cold in winter than those who are obese?