Chemistry for nursing entrance exams worksheet with answers

Which particle has almost no mass compared with the others in an atom?

1. AThe nucleus as a whole
2. BNeutron
3. CProton
4. DElectron

What is an empirical formula?

1. AThe simplest whole-number ratio of atoms in a compound
2. BThe mass of one mole of a compound
3. CA drawing of how the atoms are bonded
4. DThe actual number of each atom in one molecule

Which state of matter has a fixed volume but takes the shape of its container?

1. ALiquid
2. BPlasma
3. CGas
4. DSolid

Nitrogen is in group 15 of the periodic table. How many valence electrons does a nitrogen atom have?

1. A5
2. B7
3. C15
4. D3

Which statement about elements in the same group is correct?

1. AThey have the same number of electron shells but different properties
2. BThey have the same number of valence electrons and similar chemical properties
3. CThey are always all gases at room temperature
4. DThey have the same atomic mass and the same number of protons

In the ideal gas law, PV = nRT, what does n stand for?

1. AThe number of moles of gas
2. BThe density of the gas
3. CThe number of molecules of gas
4. DThe number of atoms per molecule

Which element has the electron configuration 1s² 2s² 2p⁶ 3s² 3p⁵?

1. ASulfur
2. BChlorine
3. CFluorine
4. DArgon

Why does drinking seawater make dehydration worse?

1. ASeawater contains no water molecules the body can use
2. BSeawater is hypotonic, so water rushes into cells and makes them burst
3. CSeawater is hypertonic, so the body loses extra water getting rid of the salt
4. DSeawater is isotonic, so it cannot be absorbed