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?

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Solution

Elements having atomic number 3 and 19 will show properties resembling with sodium because all they belong to the same group (Group no. $I_{A}$ ).
[1 marks]

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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?

Elements having atomic number 3 and 19 will show properties resembling with sodium because all they belong to the same group (Group no. IA). [1 marks]

Elements having atomic number 3 and 19 will show properties resembling with sodium because all they belong to the same group (Group no. $I_{A}$ ).
[1 marks]