The Periodic Table — Drills · Grade 11 Science

Chapter: Atoms, Electrons & Periodicity

What these drills covers

By the end of The Periodic Table you should be able to:

6 questions, multiple choice, numeric and written answer, each with a worked explanation.

Vocabulary used: period, group (family), block (s, p, d, f), metal, nonmetal, metalloid, transition metals, noble gases.

Problem 1

A horizontal row of the periodic table is called a…
  1. family
  2. block
  3. group
  4. period
Answer and explanation

period

Horizontal rows are periods; vertical columns are groups.

Problem 2

The Group 18 elements, with full valence shells and almost no reactivity, are called the…
  1. noble gases
  2. transition metals
  3. alkali metals
  4. halogens
Answer and explanation

noble gases

Group 18 is the noble gases, unreactive because their valence shells are already full.

Problem 3

A main-group element is in Group 14. How many valence electrons does it have?
Answer and explanation

4

For main-group elements, valence electrons = group number − 10 = 14 − 10 = 4.

Problem 4

Groups 1 and 2 of the periodic table make up which block?
  1. f-block
  2. s-block
  3. p-block
  4. d-block
Answer and explanation

s-block

Groups 1–2 are the s-block, where an s sublevel is being filled.

Problem 5

Explain why the noble gases (Group 18) are so unreactive.
Answer and explanation

Noble gases have full outer electron shells (eight valence electrons, or two for helium). A full valence shell is very stable, so they have little tendency to gain, lose, or share electrons, which makes them almost completely unreactive.

Problem 6

An element has the valence configuration 4 s² 4p⁵. Where is it on the periodic table?
  1. Period 5, Group 17, a noble gas
  2. Period 7, Group 4, a metal
  3. Period 4, Group 17, a halogen
  4. Period 4, Group 7, a transition metal
Answer and explanation

Period 4, Group 17, a halogen

Highest level n = 4 → Period 4; valence electrons 4 s² 4p⁵ = 7 → Group 17, a halogen (this is bromine).

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