The number of netrons in the element Be is

The number of elements in the empty set is

Atomic number of an element is 16. State The number of valence electrons in the element

The number of synthetic elements are

The mass number and atomic number of an element are A and Z respectively. The number of neutrons in the atom of that element is calculated as___.

The atomic number and the mass number of an element M are 12 and 24 respectively . Calculate the number of neutrons in an atom of the element.

Atomic number of an element is 26. the element shows

An element has atomic number 13 and an atomic mass of 27. The number of electrons in each atom of this element is ____________ and the number of neutrons is _________