Which of the following atoms is most likely to become a cation?

A. Oxygen, atomic number 8

B. Fluorine, atomic number 19

C. Helium, atomic number 2

D. Fluorine, atomic number 9

Answer Explanation:

Fluorine has a high electronegativity, and therefore, it has a strong attraction for electrons and tends to gain electrons to form anions. Therefore, it is more likely to become a cation by losing an electron.

Therefore, the Correct Answer is D.

Q #1: The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

A. Electron

B. Quark

C. Neutron

D. Proton

Answer Explanation

Rationale

Electrons are subatomic particles that have relatively little mass and are negligible when calculating atomic mass. The atomic number is usually the sum of protons and neutrons in the nucleus of the atom.
Q #2: Using the equation PH = -log (H+), a solution with a (H+)= 10+ M has a PH of which of the following?

A. 9

B. 5

C. 1

D. 10

Answer Explanation

Concentration of H+ in the solution = 10 −1 M

pH= -log(10 −1)

pH= -(-1)

=1
Q #3: Which of the following atoms is most likely to become a cation?

A. Oxygen, atomic number 8

B. Fluorine, atomic number 19

C. Helium, atomic number 2

D. Fluorine, atomic number 9

Answer Explanation

Fluorine has a high electronegativity, and therefore, it has a strong attraction for electrons and tends to gain electrons to form anions. Therefore, it is more likely to become a cation by losing an electron.

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Which of the following atoms is most likely to become a cation?

More Questions on TEAS 7 Science

Q #1: The component of an atom that possesses relatively little mass, thus being negligible in calculating the atomic mass number, is the:

Answer Explanation

Q #2: Using the equation PH = -log (H+), a solution with a (H+)= 10+ M has a PH of which of the following?

Answer Explanation

Q #3: Which of the following atoms is most likely to become a cation?

Answer Explanation

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