Define the term - 'atomic number of an atom. If an atom 'A' has an atomic number of - eleven, state the number of protons & electrons it contains.

Define the term - 'mass number of an atom. If an atom 'B' has mass number 35 & atomic number 17, state the number of protons, electrons & neutrons it contains.

An element has an atomic number 16. State the number of valence electrons.

Define atomic number and mass number of an atom.

Define the following: Atomic number

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

The number of paired electrons in oxygen atom is :

The number of valence electrons in carbon atom is

Atomic number of an ion is the same as the number of electrons present in it.

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

Nitrogen atom has atomic number 7 And oxygen has atomic number 8 calculate the total number of electrons in nitrate ion