Electronic configuration of deuterium is -1s-2-1s-1-1s-2-2s-1-1s-2-2s-2-

Question

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Hydrogen has one proton and no neutron- Its atomic number is one and electronic configuration is 1s1-Deuterium has one neutron and one proton- The mass number of deuterium is 2- Its electronic configuration is same as that of hydrogen- 1s1 as it is an isotope of hydrogen-

Electronic configuration of deuterium is _________.
$1 s^{2}$
$1 s^{1}$
$1 s^{2} 2 s^{1}$
$1 s^{2} 2 s^{2}$

Hydrogen has one proton and no neutron. Its atomic number is one and electronic configuration is $1 s^{1}$ .
Deuterium has one neutron and one proton. The mass number of deuterium is $2$ . Its electronic configuration is same as that of hydrogen, $1 s^{1}$ as it is an isotope of hydrogen.

Electronic configuration of deuterium is _________.1s21s11s22s11s22s2

Hydrogen has one proton and no neutron. Its atomic number is one and electronic configuration is 1s1.Deuterium has one neutron and one proton. The mass number of deuterium is 2. Its electronic configuration is same as that of hydrogen, 1s1 as it is an isotope of hydrogen.

Electronic configuration of deuterium is _________.
$1 s^{2}$
$1 s^{1}$
$1 s^{2} 2 s^{1}$
$1 s^{2} 2 s^{2}$

Hydrogen has one proton and no neutron. Its atomic number is one and electronic configuration is $1 s^{1}$ .
Deuterium has one neutron and one proton. The mass number of deuterium is $2$ . Its electronic configuration is same as that of hydrogen, $1 s^{1}$ as it is an isotope of hydrogen.