Worksheet: Halogens

In this worksheet, we will practice describing the compounds and reactivities of halogens and trends in their physical and chemical properties.

Q1:

Which of the following is a halogen?

  • AArsenic
  • BThallium
  • CAstatine
  • DSelenium
  • EGermanium

Q2:

Halogens can generally be found as diatomic molecules (e.g., I2). What type of bonding occurs in these molecules?

  • ACovalent
  • BMetallic
  • CIonic

Q3:

Which of the following is not a property of the halogens?

  • AThey have low melting points.
  • BThey are good thermal conductors.
  • CThey are colored.
  • DThey are poor electrical conductors.
  • EThey have low boiling points.

Q4:

As halogens increase in atomic number, which of the following trends is observed?

  • AToxicity increases.
  • BReactivity decreases.
  • CBoiling point decreases.
  • DMelting point decreases.
  • EAtomic radius decreases.

Q5:

In which of the following sequences are the halogens arranged in order of increasing molar entropy at room temperature?

  • A I < B r < C l 2 2 2
  • B C l < B r < I 2 2 2
  • C C l = B r < I 2 2 2
  • D C l < B r = I 2 2 2
  • E I = B r < C l 2 2 2

Q6:

At room temperature, which hydrogen halide has the lowest boiling point?

  • A H F
  • B H C l
  • C H I
  • D H B r
  • E H A t

Q7:

Which of the following halide salts contains the fewest ions per unit volume?

  • AStrontium fluoride (density 4.24 g/cm3)
  • BCesium fluoride (density 4.64 g/cm3)
  • CLithium iodide (density 4.08 g/cm3)
  • DSodium bromide (density 3.21 g/cm3)
  • EMagnesium bromide (density 3.72 g/cm3)

Q8:

Which of the following halide salts contains the most ions per unit volume?

  • ACalcium bromide (density: 3.35 g/cm3)
  • BPotassium bromide (density: 2.74 g/cm3)
  • CBeryllium iodide (density: 4.33 g/cm3)
  • DRubidium chloride (density: 2.80 g/cm3)
  • ESodium iodide (density: 3.67 g/cm3)

Q9:

Which of the following halogens is a solid at room temperature?

  • AFluorine
  • BBromine
  • CIodine
  • DAstatine
  • EChlorine

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