₁H² and ₁H³ are:
The neutral atoms of all of the isotopes of the same element have:
Consider the species ₁₇C³⁵ and ₁₇C³⁷. These species have:
Atomic mass of an element is equal to:
The maximum mass of an atom is concentrated in:
Consider isotope ₉₂U²³⁷ of uranium. The number of neutrons in it is:
The symbol denotes the proton number is:
The number of neutron(s) in Protium is:
In an atom, the nucleus when compared to the extra-nuclear part, is:
If an element B has five protons and six neutrons, what will be the symbol of element B?