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CHEMISTRY [1 Mark Question Answer]

Unit - 4.1 Structure of an Atom · ICSE STD 8 (ICSE - English Medium). 6 questions.

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[1 Mark Question Answer]

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6 questions · timed · auto-graded

Question 11 Mark
State any four observations made by Rutherford, in bombarding gold foil with alpha particles.
Answer
State any four observations made by Rutherford in bombarding Gold foil with Alpha particles :-
- Some alpha particles passed Straight. Through the gold foil.
- some were deflected by small angles.
- some were deflected by large angles.
- some alpha particles rebounded back.
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Question 21 Mark
Write the correct statements :
The core of an atom is called its center.
Answer
The core of an atom is called its nucleus.
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Question 31 Mark
Write the correct statements :
The mass of neutron is equal to the hydrogen atom and it is positively charged.
Answer
The mass of neutron is equal to the hydrogen atom and it is neutral charged.
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Question 41 Mark
Write the correct statements :
The electrons in the outermost orbit of an atom are called bound electrons.
Answer
The electrons in the outermost orbit of an atom are called valence electrons.
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Question 51 Mark
Write the correct statements :
A proton is 1/1837 times heavier than an electron.
Answer
A proton is 1837 times heavier than an electron
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[1 Mark Question Answer] - CHEMISTRY STD 8 Questions - Vidyadip