General Science MCQs - Structure Of Atom
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| General Science MCQs - Structure Of Atom |
Structure Of Atom MCQs
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These have the same number of protons in each atom but the neutron number can vary...
A) isotopes ✔️
B) molecules
C) ions
D) isobars
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An atom of carbon contains 6 protons and 6 neutrons, its mass number will be...
A) 12 ✔️
B) 6
C) 18
D) 24
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The center or core of an atom is called...
A) orbital
B) nucleus ✔️
C) proton
D) neutron
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An element has seven electrons in its valance shell, its valancy is...
A) 7
B) 0
C) -1 ✔️
D) 8
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Atoms are composed of ____ types of particles.
A) two
B) three ✔️
C) four
D) five
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Which of the following is/are responsible for most of the atomic mass?
A) protons
B) neutrons
C) electrons
D) both A And B ✔️
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Which of the following have positive charge?
A) protons ✔️
B) neutrons
C) electrons
D) none of these
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Which of the following have negative charge?
A) protons
B) neutrons
C) electrons ✔️
D) none of these
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Which particle of an atom is electrically neutral ?
A) protons
B) neutrons ✔️
C) electrons
D) all of these
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Electrons revolve around the nucleus in particular paths called...
A) orbit
B) shells
C) both A And B ✔️
D) none of these
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The orbit near the nucleus is called....
A) K-shell ✔️
B) L-shell
C) M-shell
D) M-shell
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The second near orbit to the nucleus is called....
A) K-shell
B) L-shell ✔️
C) M-shell
D) M-shell
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The maximum number of electrons in first orbit K is...
A) 32
B) 18
C) 8
D) 2 ✔️
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The maximum number of electrons in second orbit L is...
A) 32
B) 18
C) 8 ✔️
D) 2
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The maximum number of electrons in Third orbit M is ...
A) 32
B) 18 ✔️
C) 8
D) 2
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The maximum number of electrons in forth orbit N is...
A) 32 ✔️
B) 18
C) 8
D) 2
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Number of protons and electrons in an atom is...
A) 6 ✔️
B) 11
C) 12
D) 10
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Number of protons and electrons in an atom is...
A) different
B) same ✔️
C) average
D) constant
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Size of single atom is.....
A) 1 nm
B) 0.1 nm ✔️
C) 0.11 nm
D) 1.0 nm
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Total no of protons or Electrons in atom of each element is called it's....
A). Atomic number ✔️
B) atomic mass
C) molecular mass
D) none of these
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Atomic number is denoted by....
A) A ✔️
B) Z
C) X
D) At
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Atomic mass of aluminium is 27, and its atomic number is 13, find the number of protons and number of neutrons in aluminium?
A) 13,14 ✔️
B) 14,13
C) 12,15
D) 15,12
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Mass number of an atom represents...
A) sum of proton and electron
B) sum of proton and neutron ✔️
C) difference of neutron and proton
D) sum of electrons and neutrons
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The combining capacity of the atoms to form molecules either with same or different elements is known as...
A) joining
B) valiancy ✔️
C) combination
D) none of these
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Atomic number of magnesium...
A) 11
B) 12 ✔️
C) 13
D) 14
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Valiancy depends upon number of electrons present in the....
A) most inner shell
B) outermost shell ✔️
C) middle shell
D) anyone in the above
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_______ is a charged particle that is formed by the removal or addition of one or more electrons from an atom or molecules.
A) valiancy
B) ion ✔️
C) isotopes
D) none of these
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If an electron or more than one electrons are removed from an atom it becomes a positive ion which is also known as....
A) cation ✔️
B) anion
C) both A And B
D) none of these
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If an electron or more than one electrons are added to an atom, it becomes a negative ion wich is also known as...
A) cation
B) anion
C) both A And B
D) none of these
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The representation of molecule of a compound in the form of symbols is called...
A) symbols
B) deuterium
C) chemical formula ✔️
D) isotopes
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CaCO3 Is The chemical formula of....
A) calcium carbonate ✔️
B) calcium carbon dioxide
C) sulphate acid
D) ammonia
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Atoms of Same elements having same number of protons but different number of neutrons are called ...
A) valiancy
B) ions
C) isotopes ✔️
D) none of these
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Which of the following property / Properties of the most isotopes are the same ?
A) chemical ✔️
B) physical
C) both A And B
D) none of these
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