Structure of the Atom MCQ Questions Class 9 Science Chapter 4
NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom. Structure of the Atom MCQ Questions with Answers from Class 9 Science Chemistry.
Structure of the Atom MCQ Questions Class 9 Science Chapter 4
Structure of the Atom Multiple Choice Questions with Answers Class 9 Science Chapter 4 PDF is available.
1.) Electron is represented as ……….
a) El
b) E
c) e
d) none of the above
ANS-e
2.) Proton is represented as………….
a) Pr
b) E
c) P
d) None of the above
ANS-P
3.) Ions containing positive charge called…………
a) Positive charge
b) Positive ion
c) Proton
d) Photon
ANS-Proton
4.) Ions containing negative charge called………….
a) Electron
b) Negative particle
c) Negative ion
d) Negative charge
ANS-Electron
5.) Atoms is composed of…………….and………….
a) Neutron
b) Proton , electron
c) Positron, proton
d) Neutron , electron
ANS-Proton , electron
6.) Which experiment designed by Rutherford?
a) Atom is looks like watermelon
b) Moving alpha particles fall on thin magnesium foil
c) Moving alpha particles fall on thin gold foil
d) Moving alpha particles fall on thin silver foil
ANS-Moving alpha particles fall on thin gold foil
7.) The revolution of the electron in a circular orbit is not expected is not expected to be stable.
a) It is drawback of Dalton
b) It is drawback Rutherford’s
c) It is drawback Mendeleev’s
d) None of the above
ANS-It is drawback Rutherford’s
8.) The orbit or shells are called………………
a) Energy level
b) Subshells
c) Parameters
d) K shell
ANS-Energy level
9.) First Orbits or shells represent by the letter
a) K
b) P
c) T
d) M
ANS-K
10.) Second Orbits or shells represent by the letter
a) K
b) L
c) T
d) M
ANS-L
11.) Uncharged particle present in the atom called……….
a) Positron
b) Neutron
c) Electron
d) None of the above
ANS-Neutron
12.) ………….. are present in atoms having no any charge
a) Positron
b) Neutron
c) Electron
d) None of the above
ANS-Neutron
13.) Molecular mass means sum of …………………. and ……………
a) Proton, neutron
b) Proton , electron
c) Positron, proton
d) Photon, neutron
ANS-Proton, neutron
14.) Sum of proton and neutron gives……………………. Of molecule
a) Atomic number
b) Atomic unit
c) Molecular formula
d) Molecular weight
ANS-Molecular weight
15.) Atomic number means?
a) Proton number
b) Neutron number
c) Proton and neutron number
d) Electron and proton number
ANS-Proton number
16.) How many electrons occupy in K shell?
a) 1
b) 2
c) 4
d) 8
ANS-2
17.) How many electrons occupy in M shell?
a) 1
b) 8
c) 18
d) 32
ANS-18
18.) The maximum number of electrons present in shells is given by the below formula
a) 2n
b) 2n2
c) 2n*2
d) 2n3
ANS- 2n2
19.) How many electron present in outermost shell of lithium atom.
a) 1
b) 2
c) 3
d) 5
ANS-1
20.) How many electron present in outermost shell of Al atom.
a) 1
b) 2
c) 3
d) 5
ANS-3
21.) How many electron present in outermost shell of C atom.
a) 1
b) 2
c) 3
d) 4
ANS-4
22.) The electrons present in the outermost shell of atom are known as ……………..
a) Charge
b) Valence electron
c) K shell
d) M shell
ANS-Valence electron
23.) If the L shell accommodate by 8 electrons then valency of element is…………………
a) 5
b) 2
c) 6
d) 0
ANS-0
24.) Zero valence electron of element is always …………………….
a) Halogen
b) Metals
c) Nonmetals
d) Noble gaseous
ANS-Noble gaseous
25.) How many neutron present in hydrogen?
a) 1
b) 2
c) 3
d) 0
ANS-0
In case you are missed :- Previous Chapter MCQ Questions
26.) Number of electrons present in neon ?
a) 6
b) 8
c) 10
d) 5
ANS-10
27.) Electronic Configuration of sodium atom
a) 2 8 2
b) 2 8 8
c) 2 8 1
d) 2 8 0
ANS-2 8 1
28.) Electronic Configuration of Al atom
a) 2 8 2
b) 2 8 8
c) 2 8 1
a) 2 8 3
ANS- 2 8 3
29.) Valency of boron is……………
a) 2
b) 5
c) 1
d) 3
ANS-3
30.) Valency of Argon is………………
a) 5
b) 8
c) 0
d) 2
ANS-0
31.) An atom of each element has a definite combining capacity known as……………
a) Tendency
b) Charge
c) Electronic configuration
d) Valency
ANS-Valency
32.) Atomic number denoted by…..
a) Na
b) NA
c) Z
d) P
ANS-Z
33.) Z symbol is use for………..
a) Atomic mass
b) Atomic weight
c) Proton number
d) Neutron number
ANS- Proton number
34.) Z for carbon atom is ……………
a) 4
b) 5
c) 6
d) 8
ANS-6
35.) …………………… is defined as the total number of protons present in the nucleus of atom
a) Atomic mass
b) Atomic number
c) Proton weight
d) Neutron number
ANS-Atomic number
36.) Carbon atom has molecular weight 12u, and proton number is 6u, so what is neutron number ?
a) 5
b) 3
c) 2
d) 6
ANS-6
37.) Mass of Aluminium is 26 so how many proton present in the molecule?
a) 11
b) 12
c) 13
d) None of the above
ANS-13
38.) Some elements having same atomic number but different mass number this is happened due to….
a) Different proton number
b) Different mass
c) Different electron number
d) Different neutron number
ANS-Different neutron number
39.) Below Which isotopes is not from hydrogen family?
a) Protium
b) Deuterium
c) Tritium
d) None of the above
ANS-None of the above
40.) Protium is a isotope of
a) Chlorine
b) Promodium
c) Phosphorus
d) Hydrogen
ANS- Hydrogen
41.) ………………….. having similar chemical property but different physical property
a) Protons
b) Molar mass
c) Isotopes
d) None of the above
ANS-Isotopes
42.) Choose incorrect option
a) Isotope of uranium used as fuel in nuclear reactor
b) Isotope of cobalt is used in food preservatives
c) Isotopes of iodine is used for treatment of goitre
d) Isotope of ‘Co’ used in the treatment of cancer
ANS-Isotope of cobalt is used in food preservatives
43.) Element having different atomic number but same mass number called
a) Proton
b) Isotope
c) Isoform
d) Isobar
ANS-Isobar
44.) Element having 11 atomic number , find out its electron number
a) 5
b) 6
c) 10
d) 11
ANS-11
45.) Krypton is …………………
a) Halogen
b) Solid
c) Metals
d) Noble gas
ANS-Krypton
46.) Element having 1 mass number then what is its atomic number?
a) 2
b) 3
c) 4
d) 1
ANS-1
47.) Atomic mass number of B is 11 what is its neutron number?
a) 5
b) 6
c) 4
d) 11
ANS-6
48.) Atomic number of fluorine
a) 7
b) 8
c) 9
d) 10
ANS-9
49.) Symbol of beryllium
a) B
b) Be
c) Br
d) None of the above
ANS-Be
50.) L shell is a outermost orbit of fluorine, so what is its valency ?
a) 6
b) 8
c) 0
d) 1
ANS-1
In case you are missed :- Next Chapter MCQ Questions
