Which of the following orbitals is the last to fill?

A. 1s

B. 3s

C. 4p

D. 6s

Answer Explanation:

Of these orbitals, the last to fill is 6s.

Orbitals fill in the following order: 1s, 25, 2p. 35, 3p, 4s, 3d, 4p, 55, 4d, 5p. 6s, 4f, 5d, 6p. 7s, 5f, 6d, and 7p. The number is the orbital number, and the letter is the sublevel identification. Sublevels has one orbital and can hold a maximum of two electrons. Sublevel p has three orbitals and can hold a maximum of six electrons. Sublevel d has five orbitals and can hold a maximum of 10 electrons, Sublevel f has seven orbitals and can hold a maximum of 14 electrons.

Therefore, the Correct Answer is D.

Q #1: There are three Insects that are being compared under a microscope. As a scientist, you decide that measuring them would be an important part of recording their data. Which unit of measurement would best for this situation?

A. Centimeters

B. Meters

C. Micrometers

D. Kilometers

Answer Explanation

The best use of the International System of Units (SI) for this situation would be the use of the micrometer as it is the smallest unit of measurement provided and the scientist is using a microscope to view the insects.
Q #2: Which of the following molecules exhibits ionic bonding?

A. NaCl

B. CO2

C. C6H12O6

D. H2O

Answer Explanation

Sodium chloride exhibits lonic bonding due to the attraction between Na+ ions and Cl- ions.

Typically, elements on the opposite sides of the periodic table (a metal and a nonmetal) form ionic bonds. Carbon dioxide, water, and glucose exhibit covalent bonding. Typically, elements on the same side of the periodic table (two or more nonmetals) form covalent bonds.
Q #3: Which of the following anatomical terms is NOT part of the knee?

A. Medial collateral ligament

B. Patella

C. Lateral malleolus

D. Lateral meniscus

Answer Explanation

The term "lateral malleolus" refers to the bony prominence on the outer side of the ankle.

It is part of the ankle joint, not the knee joint. The other options, such as the medial collateral ligament, patella, and lateral meniscus, are all associated with the knee joint.

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Which of the following orbitals is the last to fill?

More Questions on TEAS 7 Science

Q #1: There are three Insects that are being compared under a microscope. As a scientist, you decide that measuring them would be an important part of recording their data. Which unit of measurement would best for this situation?

Answer Explanation

Q #2: Which of the following molecules exhibits ionic bonding?

Answer Explanation

Q #3: Which of the following anatomical terms is NOT part of the knee?

Answer Explanation

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