Tiwari Academy Discussion

Asked: December 18, 2020In: Class 10 Science

Write down five major differences between Mendeleev periodic table and Modern periodic table.

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: 1

Chemistry 10 Sir

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

Chemistry Solution Teacher

Asked: December 18, 2020In: Class 10 Science

What is methane Draw the election dot structure. Name the type of bond formed in this compound they one such compounds-

NCERT Solutions for Class 10 Science Chapter 4 Important Board Questions Carbon and its Compounds NCERT Books for Session 2022-2023 CBSE Board and UP Board Long Type Question Questions No: 4

Poll

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

First three periods in periodic table are

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: 4

Poll

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

Across period, Atomic size decreases due to

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: 3

Poll

Chemistry 10 Sir

Asked: December 18, 2020In: Class 10 Science

In periodic table Heluim (He) is placed at

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: 2

Write down five major differences between Mendeleev periodic table and Modern periodic table.

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 –

What is methane Draw the election dot structure. Name the type of bond formed in this compound they one such compounds-

First three periods in periodic table are

Across period, Atomic size decreases due to

In periodic table Heluim (He) is placed at

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