The element with atomic number 2 is similar in chemical properties to the element with atomic number 20
Correct or Incorrect?
4 answers
2 is helium ... 20 is calcium
its a yes or no question I know 2 is helium and 20 is calcium
Do you think He, as a gas, as similar properties to Ca, as a solid?
are He and Ca in the same column of the periodic table?