Chemistry, 28.06.2019 21:20 jstyopin

Select the correct answer. an atom of nitrogen has seven electrons. which diagram correctly represents the arrangement of these electrons? a. two blue boxes representing 1s and 2s orbitals, and one set of three blue boxes representing 2p orbitals; 1s and 2s orbitals have a pair of up and down arrows; 2p orbitals show one filled orbital with a pair of up and down arrows, a partially filled orbital with one up arrow, and an empty orbital b. two blue boxes representing 1s and 2s orbitals, and one set of three blue boxes representing 2p orbitals; 1s orbital has a pair of up-facing arrows and the 2s orbital has a pair of down-facing arrows; 2p orbitals show one filled orbital with a pair of up-facing arrows, a partially filled orbital with one down-facing arrow, and an empty orbital c. two blue boxes representing 1s and 2s orbitals, and one set of three blue boxes representing 2p orbitals; 1s and 2s orbitals have a pair of up and down arrows; 2p orbitals show three partially filled orbitals with a single up-facing arrow d. two blue boxes representing 1s and 2s orbitals, and one set of three blue boxes representing 2p orbitals; 1s orbital has a pair of up-facing arrows and 2s orbital has a pair of down-facing arrows; 2p orbitals show three partially filled orbitals with one up-facing arrows in two of the orbitals and one down-facing arrow in the third

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Answer from: didirose

C. two blue boxes representing 1s and 2s orbitals, and one set of three blue boxes representing 2p orbitals; 1s and 2s orbitals have a pair of up and down arrows; 2p orbitals show three partially filled orbitals with a single up-facing arrow

Explanation:

This problem is concerned with the electronic distribution of electrons into the energy levels or sub-level of the atom of nitrogen. Here in particular, we want to know the sublevel arrangement of electrons in the nitrogen atom.

Nitrogen has 7 electrons.

In order to know the sequence of filling of the atoms we must be guided by some principles:

We must know that the maximum number of electrons in the orbitals of the sub-levels are: 2 for s-sublevel, 6 for p-sublevel, 10 for d-sublevel and fourteen for f-sublevel. The sublevels with the lower energies are filled first according to the aufbau's principle: 1s, 2s, 2p, 3s, 3pNo two electrons can have the same set of values for the four quantum numbers i.e electrons cannot spin in the same direction. This is the pauli's exclusion principle. Electrons go into degenerate orbitals singly before pairing starts according to Hund's rule of maximum multiplicity.

Obeying these principles, we have:

N (7) = 1s²2s²2p³

The first blue boxes are the s-sublevels 1s²2s² with one orbital and would have two electrons each oriented in the up and down direction.

The p-sublevel has three orbitals and according to hund's rule, electrons would go in singly before pairing starts. This leaves the three orbitals with a single up facing arrow.

Answer from: Quest

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .

Answer from: Quest

a compound is a molecule made of atoms from different elements.

a. by the combination of an unlimited number of elements

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Select the correct answer. an atom of nitrogen has seven electrons. which diagram correctly represen...

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