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Asked: December 18, 2020In: Class 10 Science

What are metalloids? Write two names.

NCERT Solutions for Class 10 Science Chapter 5 Important Board Questions Periodic Classification of Elements NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Question Questions No: 11

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

(a) How do we calculate the valency of an element from its electronic configuration? (b) How does the valency vary in a period?

NCERT Solutions for Class 10 Science Chapter 5 Important Board Questions Periodic Classification of Elements NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Question Questions No: 9

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

Four elements P,Q,R and S have atomic number 12,13,14 and 15 respectively. Answer the following: (a) what is the valency of Q? (b) Classify these elements as metals and no-metals. (c) Which of these elements will form the most basic oxide?

NCERT Solutions for Class 10 Science Chapter 5 Important Board Questions Periodic Classification of Elements NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Question Questions No: 8

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

How does the atomic size vary as we go down a group and move left to right in a period? Write the reason behind it.

NCERT Solutions for Class 10 Science Chapter 5 Important Board Questions Periodic Classification of Elements NCERT Books for Session 2022-2023 CBSE Board and UP Board Short Question Questions No: 7

Poll

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

Elements of 1st period contains valence electron in –

NCERT Solutions for Class 10 Science Chapter 5 Important Board Questions Periodic Classification of Elements NCERT Books for Session 2022-2023 CBSE Board and UP Board Multiple Choice Question Questions No: 1

What are metalloids? Write two names.

(a) How do we calculate the valency of an element from its electronic configuration? (b) How does the valency vary in a period?

Four elements P,Q,R and S have atomic number 12,13,14 and 15 respectively. Answer the following: (a) what is the valency of Q? (b) Classify these elements as metals and no-metals. (c) Which of these elements will form the most basic oxide?

How does the atomic size vary as we go down a group and move left to right in a period? Write the reason behind it.

Elements of 1st period contains valence electron in –

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