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What is the period number of the element with atomic number 20?

Practice Questions

Q1
What is the period number of the element with atomic number 20?
  1. 2
  2. 3
  3. 4
  4. 5

Questions & Step-by-Step Solutions

What is the period number of the element with atomic number 20?
  • Step 1: Identify the atomic number given in the question, which is 20.
  • Step 2: Look at the periodic table of elements to find the element with atomic number 20.
  • Step 3: Find that the element with atomic number 20 is Calcium (Ca).
  • Step 4: Check the position of Calcium in the periodic table to determine its period.
  • Step 5: Note that Calcium is located in period 4 of the periodic table.
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