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Structure of the Atom · Gujarat Board (GSEB) STD 9 (GSEB - English Medium). 10 questions.

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10 questions · timed · auto-graded

Question 11 Mark
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
Answer
True.
Explanation:
An isotope of iodine is used for making tincture iodine, which is used as a medicine.
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Question 21 Mark
The mass of an electron is about $\frac{1}{2000}$ times that of proton.
Answer
True.
Explanation:
The mass of an electron is about $\frac{1}{2000}$ times that of proton.
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Question 31 Mark
A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.
Answer
False.
Explanation:
A neutron is formed by an electron and a proton combining together. Therefore, it is neutral.
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Question 41 Mark
J.J. Thomson proposed that the nucleus of an atom contains only nucleons.
Answer
False.
Explanation:
J.J. Thomson proposed that the nucleus of an atom contains only nucleons.
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Question 51 Mark

The anode rays obtained from all the gases consist of positively charged particles called protons.
Answer
False.
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Question 61 Mark
The cathode rays obtained from all the gases consist of negatively charged particles called electrons.
Answer
True.
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Question 71 Mark
:
Radioactive isotope of iodine is used for making the medicine called tincture iodine.
Answer
The given statement is false.
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Question 81 Mark
Most part of the atom is hollow.
Answer
True.
Explanation:
An atom, in which many electrons are located in the outer electron shells while many inner electron states are empty, is called a "hollow atom".
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Question 101 Mark
$\alpha-$Particles are positively charged.
Answer
True.
Explanation:
An The alpha particle is a helium nucleus; it consists of two protons and two neutrons. It contains no electrons to balance the two positively charged protons. Alpha particles are therefore positively charged particles moving at high speeds. Beta particles are emitted by neutron rich unstable nuclei.
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