Question

the atomic weight of an element is doubled its atomic no. if there are four electron in 2p orbitals, the element is

Answer 1

four electrons in 2p orbital means its electronic configuration is 1S2 2S2 2P4 means 8 electrons which is oxygen

Answer 2

Explanation:

As it is given that there are only four electrons present in 2p orbital. Therefore, electronic configuration of this element will be as follows.

                 $1s^{2}2s^{2}2p^{4}$

Hence, this means that total number of electrons present in this element are 8. So, its atomic number will be equal to 8 and as atomic weight of this element is doubled its atomic no. therefore, its atomic mass will be (8 + 8) = 16 g/mol.

According to the periodic table, element with atomic number 8 and atomic mass 16 is oxygen.

Thus, we can conclude that the given element is oxygen.