Chemistry for nursing entrance exams worksheet with answers

Between which kinds of elements do ionic bonds usually form?

1. ATwo identical metals
2. BTwo noble gases
3. CA metal and a nonmetal
4. DTwo nonmetals

Sodium and potassium belong to which group?

1. AThe alkali metals (group 1)
2. BThe alkaline earth metals (group 2)
3. CThe noble gases (group 18)
4. DThe halogens (group 17)

Which property is typical of metals?

1. AMost of them are gases at room temperature
2. BThey are poor conductors of heat
3. CThey conduct electricity well
4. DThey are brittle solids that shatter

Which assumption is made about an ideal gas?

1. AIts particles are large, closely packed and strongly attracted
2. BIts particles have no attraction to each other
3. CIts particles stay still at room temperature
4. DIts particles lose energy in every collision

Which nuclear process powers the Sun?

1. AFusion of hydrogen nuclei to form helium
2. BAlpha decay of helium
3. CCombustion of hydrogen gas with oxygen in its core
4. DFission of uranium into smaller nuclei

What charge do group 16 elements such as oxygen and sulfur usually have as ions?

1. A1−
2. B6+
3. C2+
4. D2−

10 g of a substance dissolves in water to make 250 mL of solution. What is its concentration in g/L?

1. A40 g/L
2. B25 g/L
3. C0.04 g/L
4. D2.5 g/L

100 mL of 1 M NaCl is mixed with 100 mL of 3 M NaCl. What is the concentration of the mixture?

1. A1.5 M
2. B3 M
3. C4 M
4. D2 M