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Class 12 Physics (Part Ii) Chapter 12 Atoms Quiz 4 (25 MCQs)

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1. Planetary model of the atom was proposed by
2. This is what holds atoms in a molecule and compound together. They can be ionic, covalent, or metallic (and you'll learn about these in high school chemistry).
3. Perpendicular distance between the initial velocity direction of alpha particle and center of the nucleus is called
4. Name the series of hydrogen atom which lies in U.V region
5. A field of science that studies atoms and molecules is called
6. What is the charge of an object with 12 protons and 4 electrons?
7. The scientist who invented the classification system for the elements:
8. Molecules move quickest in which state of matter
9. What is the main difference between protons and neutrons?
10. Rutherford's nuclear atom model failed to explain
11. Mass and weight are the same
12. What are substances containing only one kind of atom called?
13. The transition from the state n = 3 to n = 1 in a hydrogen like atom results in ultraviolet radiation. Infrared radiation will be obtained in the transition from-
14. Particle A has very little mass in comparison to Particle B. Both particles are in the same atom. Which is the best conclusion about Particles A and B?
15. When and where was John Dalton born?
16. These are what form chemical bonds as atoms share or take them from one another. They orbit the nucleus and have a negative charge (but they are still happy about things in general).
17. Who was the first to call atoms atoms
18. For chemistry, the best way to think of this is how much stuff there is in a substance. For physics, the best way to think of this is its the measure of an object's resistance to a change in its motion.
19. The ..... is a small, dense region at the center of the atom. It consists of positive protons and neutral neutrons, so it has an overall positive charge.
20. This subatomic particle of an atom has a POSITIVE charge.
21. What subatomic particle is represented by this charge (-):
22. Electrons have what charge?
23. This subatomic particle of an atom has NO charge.
24. If 18g of Water is DECOMPOSED, how much Oxygen and how much Hydrogen are obtained?
25. The ionization potential of hydrogen atom is
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