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Byju's Answer

Standard IX

Chemistry

Atoms

Consider an a...

Question

Consider an atom of manganese, represented as $_{25} M n^{55}$ Give the number of :

(i) Electron (ii) protons (iii) nucleons present in the atom.

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Solution

Number of electrons = 25

Number of protons = 25

Number of nucleons = 55

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Multiple Choice Questions

(a) The outermost shell of an atom is known as

(i) valency

(ii) valence electrons

(iii) nucleus

(iv) valence shell

(b) The number of valence electrons present in magnesium is

(i) two

(ii) three

(iii) four

(iv) five

(i) proton

(ii) neutron

(iii) electron

(iv) nucleon

(d) If the atomic number of an atom is 17 and mass number is 35 then number of neutrons will be

(i) 35

(ii) 17

(iii) 18

(iv) 52

(e) The number of electrons in an atom is equal to the number of

(i) protons in a neutral atom

(ii) neutrons in a neutral atom

(iii) nucleons in a neutral atom

(iv) none of the above

(f) The sum of number of protons and number of neutrons present in the nucleus of an atom is called its

(i) mass number

(ii) atomic number

(iii) number of electrons

(iv) all of the above

The mass number and atomic number of an element is 23 and 11 respectively. What is the number of nucleons present in it?

The number of nucleons in an atom is called __________________.

Q. An atom with mass number 22 consists of 10 protons. Find the number of nucleons in the atom.

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Consider an atom of manganese, represented as 25Mn55 Give the number of : (i) Electron (ii) protons (iii) nucleons present in the atom.

Number of electrons = 25 Number of protons = 25 Number of nucleons = 55

Consider an atom of manganese, represented as $_{25} M n^{55}$ Give the number of :

(i) Electron (ii) protons (iii) nucleons present in the atom.

Number of electrons = 25

Number of protons = 25

Number of nucleons = 55