What is electronic configuration of hydrogen and helium

Explanation:

Atomic number of hydrogen is 1 as it is the very first element of periodic table.

Hence, electronic configuration of hydrogen is .

On the other hand, second element of the periodic table is helium and its atomic number is 2. Helium is also known as a noble gas.

Therefore, electronic configuration of helium is .

Thus, we can conclude that electronic configuration of hydrogen and helium is and .

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.