What are the first three quantum numbers for the electrons located in subshell 2s?

The first three quantum numbers for the electrons located in subshell 2 s are:

Explanation:

Each subshell may have 1 or 2 electrons.

The number 2 in the notation 2s is the first quantum number named main quantum number, n, and it identifies the principal energy level.

So, the first quantum number for any of the two electrons in the subshell 2s is 2.

The letter s is shape of the orbital and it is related with the second quantum number, named azimuthal quantum number and identified with the leter ℓ, as per this table:

Shape of the orbital              Azimutal quantun number, ℓ

           s                                                     0

           p                                                     1

           d                                                     2

           f                                                      3

So, the second quantum number for any electron in 2s subshell is 0.

As for the third quantum number, it is the magnetic quantum number, identified with mℓ.

The magnetic quantum number, mℓ, can have integer values from - ℓ to + ℓ. Since ℓ = 0, the only valid number for mℓ for the subshell 2s is 0.

Summarizing, the first three quantum numbers for the electrons located in subshell 2 s are:

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.