What is atomic number?

What is the atomic number of Helium?

Radioisotope carbon-14 is a beta -emitter. What is the atomic number of the daughter element ?

An atom has electronic configuration 2, 8, 7. What is the atomic number of this element?

What is the atomic number of the daughter element produced if an alpha particle is emitted from overset(238)underset(92)U ?

Electronic configuration of a transition element (X) in + 3 oxidation state is [Ar]3d^(5) . What is its atomic number -

What is the atomic number of the element with M^(2+) ion having electronic configuration [Ar]3d^(8) -

The equation of a nuclear fusion : 2 deuteron to X +1 neutron What is the atomic number of X ? (deuteron is the nucleus of deuterium or heavy hydrogen )

(i) The electronic configuration of an atom is [Z](n-2) f^(14)(n-1)d^(1)ns^(2) . What is the minimum position of the atom in the periodic table and correspondingly what is the atomic number of Z? (ii) Find the number of unpaired electrons in the atom of the element having atomic number 16. (iii) Which of the following ions does not obey Bohr's atomic theory? He^(2+),Li^(2+),B^(3+),Be^(3+) .

Find the number of unpaired electrons in the atom of the element having atomic number 16 .

How many electrons with l =2 are there in on atom having atomic number 23?