The nuclei of elements X,Y and Z have same number of protons, but different nembers of neutrons. According to Mendeleef periodic table, the elements X,Y and Z

Nuclei having same number of protons but different number of neutrons are known as

The nuclei having the same number of protons but different number of neutrons are called

The atoms of same element which have same numbers of protons, but have different number of neutrons are called …………..

The atoms of two element A and B contain the same number of protons but different number of neutrons in their nuclei. What kind of element are A and B?

The number of elements known when Mendeleef presented periodic table is

Atoms of different elements with their nuclei having same number of neutrons but different number of protons are called.

Two nuclei have different number of protons and different number of neutrons. Can they have the same radii and same nuclear density?

Two elements X and Y have atomic numbers 10 and 14 respectively. Identify the group numbers of these elements in the periodic table.

Three elements X, Y and Z have atomic numbers 7, 10 and 14 respectively. (i) Identify the group number of these elements in the periodic table. (ii) Mention one unique feature each of elements Y and Z. (iii) Which of the above two elements belong to the same period ?