Q.1. The maximum number of electrons in L shell is
Q.2. Which of the following statements is correct?
(a) Cathode rays travel in straight line and have momentum.
(b) Cathode rays travel in straight line and have no momentum
(c) Cathode rays do not travel in straight line but have Momentum.
(d) Cathode rays do not travel in straight line and have no momentum.
Q.3. Oxygen is –
Q.4. Molecular mass of water (H2O) is
Q.5. Atomicity of chlorine and Argon is
(a) Diatomic and Monoatomic
(b) Monoatomic and Diatomic
(c) Monoatomic and Monoatomic
(d) Diatomic and Diatomic
Q.6. Stat the properties of cathode rays?
Q.7. Define the terms:
(a) Atomic number
(b) Mass number
Q.8. State the law of constant Proportion?
Q.9. Which postulate of Dalton’s atomic theory can explain the law of definite proportions?
Q.10. Which element will be more reactive and why → the element whose atomic number is 10 or the one whose atomic number is 11?
Q.11. What is the mass of 0.2 mole of oxygen atoms?
|1. What is an atom?|
|2. How are atoms and molecules related?|
|3. What is the difference between an atom and a molecule?|
|4. How do atoms and molecules behave in chemical reactions?|
|5. Can atoms and molecules be seen with a microscope?|