Lesson Worksheet: Group 15 Chemistry

In this worksheet, we will practice describing and explaining the properties and economic importance of the group 15 elements.


Group 15 elements have similarities in the electronic configurations of their atoms. How do the electronic configurations of the group 15 elements terminate?

  • Ad
  • Bp
  • Cs
  • Dd
  • Ep


Which of the following statements correctly states a similarity between arsenic and antimony?

  • AThey are both more abundant in Earth’s crust than phosphorus.
  • BThey are both metalloids.
  • CThey both contain 4 electrons in their last p orbital.
  • DThey are both less dense than nitrogen.
  • EThey both form diatomic molecules under standard conditions.


Group 15 elements form hydrides of the formula XH3.

Why are group 15 hydrides considered to be basic?

  • AThey are formed from highly electronegative elements.
  • BThey react vigorously with alkaline solutions.
  • CThey have a lone pair of electrons in the outer valence shell.
  • DThe central atom only bonds with hydrogen atoms.
  • EThey are able to form dative or coordinate bonds.

Which statement best explains why group 15 hydrides decrease in basic strength as we go down the group?

  • AStronger bonds are formed between the central atom and the hydrogen atoms.
  • BThe increased size of the atom decreases the electron density of the lone pair.
  • CLarger hydrides lose their hydrogen atoms more easily to OH ions forming water molecules.
  • DAs the size of the atom increases, it is more able to donate its pair of electrons to another atom.
  • EThe steric strain created between the bonds and the central atom decreases.


Which of the following is a group 15 element?

  • ANa
  • BN
  • CNi
  • DNe
  • ENb


What are the three allotropic forms of arsenic?

  • ARed, black, and gray
  • BRed, black, and violet
  • CBlue, black, and red
  • DViolet, red, and gray
  • EYellow, black, and gray


Which of the following are the two most common allotropic elements in group 15?

  • ANitrogen and antimony
  • BPhosphorus and arsenic
  • CArsenic and nitrogen
  • DPhosphorus and bismuth
  • ENitrogen and bismuth


Phosphorus is an element of group 15 that exhibits allotropic forms.

What are the most common allotropes of phosphorus?

  • AGray phosphorus and red phosphorus
  • BPink phosphorus and red phosphorus
  • CWhite phosphorus and red phosphorus
  • DWhite phosphorus and gray phosphorus
  • EWhite phosphorus and pink phosphorus

Which of these allotropes is a waxy solid that can be cut with a knife?

  • AWhite phosphorus
  • BRed phosphorus
  • CBlack phosphorus
  • DPink phosphorus
  • EGray phosphorus


Which of the following pairs are metalloids included in group 15 elements?

  • APhosphorus and bismuth
  • BBismuth and arsenic
  • CAntimony and arsenic
  • DPhosphorus and arsenic
  • EAntimony and bismuth


Which of the following properties is not true for group 15 elements?

  • AThe melting points decrease down the group.
  • BThe electronegativity decreases down the group.
  • CThe metallic property increases down the group.
  • DThe atomic radii increase down the group.
  • EThe ionization energy decreases down the group.


Which of the following group 15 elements can be used in the production of the head of a match, shown in the illustration?

  • AAntimony
  • BNitrogen
  • CPhosphorus
  • DArsenic
  • EBismuth

This lesson includes 19 additional questions and 6 additional question variations for subscribers.

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