A trinegative ion of an element has 8 electrons in its M shell. The atomic number of the element is

An element has 2 electrons in the M shell. What is the atomic number of the element ?

An element has 2 electrons in the M shell. What is the atomic number of the element ?

An element has three electrons in th 4^(th) shell, the atomic number of the element is :

The atom of an element X has 7 electrons in its M shell. What is the atomic number of element X ?

The atom of an element has 2 electrons in the M shell. What will be the atomic number of the element? Name the element.

An element has 8 electrons in the valence shell

An element A has 2 electrons in its, fourth shell. State its atomic number

An atom of an element X has 2 electrons in its N shell. State the number of protons in X.

A natural atom of an element has 2K,8L, 9M and 2N electrons .The atomic number of element is :