Question 9
In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?

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Solution

The element with atomic number 12 and 38 has same chemical and physical properties as that of calcium. This is because both of them have the same number of valence electrons (2).

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Q. In the Modern Periodic Table, calcium (atomic number

20

) is surrounded by elements with atomic numbers

12, 19, 21

and

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?

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Variation of Valency

Standard X Chemistry

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Question 9 In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?

The element with atomic number 12 and 38 has same chemical and physical properties as that of calcium. This is because both of them have the same number of valence electrons (2).

Question 9
In the modern periodic table, calcium (atomic number 20) is surrounded by elements with atomic numbers 12, 19, 21, and 38. Which of these have physical and chemical properties resembling calcium?