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Atomic Structure Book Back Questions & Answers, Exercises, Solutions, Tests, Quizzes, Videos and Podcasts for Class 7 | Unit 4 | Chemistry | Science | Samacheer Kalvi – English Medium

7th Standard Samacheer Kalvi Chemistry New Book Back Questions & Answers: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/atomic-structure-3/exercises

Podcasts: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/atomic-structure-3/videos

Tests & Quizzes: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/atomic-structure-3/tests

Flash Cards: https://www.thelearning.app/samacheer-kalvi-english-medium/class-7/science-2/atomic-structure-3/flashcards

Visit https://www.thelearning.app by EduDeck. Learn, Practice & Evaluate From Anywhere.

00:00 Introduction
00:14 Choose the correct answer
03:15 Fill in the blanks
04:48 Match the following
05:28 True or false
06:22 Analogy
07:14 Assertion and Reason

Questions answered in this video –

1. The basic unit of matter is ________

2. The subatomic particle revolve around the nucleus is _______

3. _______ is positively charged.

4. The atomic number of an atom is ________

5. _______________ Nucleons comprises of

6. The smaller particles found in the atom is called _________________.

7. The nucleus has __________________ and _______________

8. The _______________ revolve around the nucleus.

9. If the valency of carbon is 4 and that of hydrogen is 1 , then the molecular formula of methane is_________________ .

10. There are two electrons in the outermost orbit of the magnesium atom. Hence, the valency of magnesium is_______________ .

11. valency

12. Neutral Partical

13. Iron

14. Hydrogen

15. Positively Charged Partical

16. The basic unit of an element is molecule.

17. The electrons are positively charged.

18. An atom is electrically neutral.

19. The nucleus is surrounded by protons.

20. Sun: Nucleus, planets: ________________.

21. Atomic number: ________________, Mass number: number of protons and neutrons.

22. K: Potassium, C: ____________________.

23. (A): An atom is electrically neutral… (R): Atoms have equal number of protons and electrons.

24. (A): The mass of an atom is the mass of nucleus… (R): The nucleus is at the centre.

25. (A): The number of protons and neutrons is atomic number… (R): The mass number is sum of protons and neutrons.

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