Chlorine in the Periodic Table is surrounded by the elements with atomic number 9, 16, 18 and 35.
(a) Which of these have Physical and Chemical properties resembling chlorine ?
(b) Which is more electronegative than chlorine ?
In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers12,19,21,38. Which of these have physical and chemical properties resembling calcium?
In the modern periodic table sodium element(atomic number 11) is surrounded by elements with atomic number 3 , 12 and 19 respectively. Which of these have physical and chemical properties resembling sodium?