In simple terms, its protons plus its neutrons.
Plus mean Example:2+2=4 It mean to add with your finger or on a piece of paper
A fundamental element, principle, or skill.
27,900,000
Sodium (Na) has been reduced.
If you add the same constant to each element of a sample then the mean of this collection of values will be the mean of the original sample plus the constant. If you multiply each element of a sample by a constant then the mean of this collection of values will be the mean of the original sample multiplied by the constant.
cerium
Please specify what you mean by 'i' in an element. If you mean which element has an i in its chemical symbol, some of them are Li, Ni, etc.
Cerium
Manganese (Mn)
The answer is BeS
plus one
Aluminium.
Carbon
a quark or if you mean the smallest element hydrogen
What does One-plus mean ?
If you mean the most common or 'ubiquitous' element, then it is hydrogen (H).