Multiple choice

Which of the following elements belong to 5th period of the periodic table?

  1. Ba
  2. Rb
  3. I
  4. Po
  5. Ag
  6. Au

  1. 1, 2 and 3

  2. 1, 3 and 6

  3. 2, 3 and 5

  4. 3, 4 and 5

  5. 4, 5 and 6

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Rubidium (37Rb: [Kr] 5S1) belongs to 5th period of the periodic table. Iodine (53I: [Kr] 4d10 5s2 5p5) belongs to 5th period of the periodic table. Silver (47Ag: [Kr] 4d10 5s1) belongs to 5th period of the periodic table.