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Nursing Question Bank

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1265 available questions

Biology · Question 11

Which heart layer contracts to generate the pumping action?

  1. Myocardium
  2. Endocardium
  3. Pericardial fluid
  4. Pleura
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Correct answer: A

Myocardium

The myocardium is the muscular heart layer.

Biology · Question 12

The wall dividing the right and left sides of the heart is called what?

  1. Septum
  2. Tendon
  3. Valve cusp
  4. Alveolus
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Correct answer: A

Septum

The septum separates the right and left sides of the heart.

Chemistry · Question 13

Two isotopes of one element differ in which nuclear particle count?

  1. Neither protons nor neutrons
  2. Neutrons
  3. Protons
  4. Both protons and neutrons necessarily
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Correct answer: B

Neutrons

Isotopes have the same proton count but different neutron counts.

Chemistry · Question 14

What determines the atomic number of an element?

  1. Number of neutrons
  2. Number of electron shells
  3. Total nucleons
  4. Number of protons
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Correct answer: D

Number of protons

Atomic number equals the number of protons in the nucleus.

Chemistry · Question 15

How many neutrons are in a carbon-14 nucleus with six protons?

  1. 20
  2. 14
  3. 8
  4. 6
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Correct answer: C

8

Neutrons = mass number minus proton number: 14 − 6 = 8.

Chemistry · Question 16

After one half-life, what fraction of the original radioactive nuclei remains undecayed?

  1. One half
  2. None
  3. One quarter
  4. Three quarters
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Correct answer: A

One half

One half-life leaves half the original radioactive nuclei undecayed.

Chemistry · Question 17

Which chemical symbol represents sodium?

  1. Na
  2. S
  3. N
  4. Si
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Correct answer: A

Na

The element sodium has the symbol Na.

Chemistry · Question 18

Which listed element has atomic number 8?

  1. Carbon
  2. Fluorine
  3. Oxygen
  4. Nitrogen
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Correct answer: C

Oxygen

NIST lists oxygen, symbol O, with atomic number 8.

Chemistry · Question 19

The symbol Fe represents which element?

  1. Fluorine
  2. Fermium
  3. Francium
  4. Iron
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Correct answer: D

Iron

Fe is the chemical symbol for iron.

Chemistry · Question 20

Which listed element belongs to group 18, the noble gases?

  1. Chlorine
  2. Neon
  3. Magnesium
  4. Sodium
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Correct answer: B

Neon

Neon is in group 18 of the periodic table.