EASY
9th CBSE
IMPORTANT
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atomic model is also called plum pudding model.

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Important Questions on Structure of Atom

EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 12
Mercury contains 80 protons and 80 electrons and 120 neutrons. Its mass number is _____.
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 12
The electronic arrangement of fluorine is _____.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 12
The total number of protons and neutrons in the nucleus of an atom is called its _____.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 12
The maximum number of electrons that can be present in the outermost shell of an atom is _____. 6 / 8 /10
MEDIUM
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 13
What experiment established the presence of atomic nucleus? What features of the nucleus were deduced from this experiment?
HARD
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 14
You have learnt that the value of e/m for electron is 2000 times that of the proton or H+. Calculate the charge to mass ratio for He+ and He2+ in comparison to e/m of the electron. Mass of helium is four times that of hydrogen. 
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 15
Isotopes of an element differ in the number of neutrons.
EASY
9th CBSE
IMPORTANT
Modern's abc+ of SCIENCE CHEMISTRY FOR Class IX>Chapter 4 - Structure of Atom>Revision Exercise>Q 15
Element having electronic arrangement 2, 7 is fluorine.