Chemistry teacher

Asked: October 28, 2020In: Class 9

Name the three sub-atomic particles of an atom.

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-49 Questions No-1

Divya Srivastava

Asked: October 28, 2020In: Class 9

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-49 Questions No-2

Divya Srivastava

Asked: October 28, 2020In: Class 9

Write the distribution of electrons in carbon and sodium atoms.

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-50 Questions No-1

Divya Srivastava

Asked: October 28, 2020In: Class 9

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-50 Questions No-2

Divya Srivastava

Asked: October 28, 2020In: Class 9

How will you find the valency of chlorine, Sulphur and magnesium?

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-52 Questions No-1

Manvik Solanki

Asked: October 28, 2020In: Class 9

If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Intext Questions Page No-52 Questions No-1

Poll

Damini Lokhande

Asked: October 27, 2020In: Class 9

Which one of the following is a correct electronic configuration of sodium?

NCERT Solutions for Class 9 Science Chapter 4 Structure of the Atom NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-55 Questions No- 18

Prisha Garg

Asked: October 22, 2020In: Class 9

How would you confirm that a colourless liquid given to you is pure water?

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No- 6

Prisha Garg

Asked: October 22, 2020In: Class 9

Explain the following giving examples. (a) saturated solution (b) pure substance (c) colloid (d) suspension.

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No- 4

Prisha Garg

Asked: October 22, 2020In: Class 9

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

NCERT Solutions for Class 9 Science Chapter 2 Is Matter Around Us Pure NCERT Books for Session 2022-2023 CBSE Board and UP Board Exercises Questions Page No-29 Questions No-5

Chemistry teacher

Name the three sub-atomic particles of an atom.

Helium atom has an atomic mass of 4 u and two protons in its nucleus. How many neutrons does it have?

Write the distribution of electrons in carbon and sodium atoms.

If K and L shells of an atom are full, then what would be the total number of electrons in the atom?

How will you find the valency of chlorine, Sulphur and magnesium?

If number of electrons in an atom is 8 and number of protons is also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

Which one of the following is a correct electronic configuration of sodium?

How would you confirm that a colourless liquid given to you is pure water?

Explain the following giving examples. (a) saturated solution (b) pure substance (c) colloid (d) suspension.

Classify each of the following as a homogeneous or heterogeneous mixture. soda water, wood, air, soil, vinegar, filtered tea.

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