If number of electrons in an atom is 8 and number of protons is also 8, then (i) What is the atomic number of the atom? (ii) What is the charge on the atom?

Question:

If number of electrons in an atom is 8 and number of protons is also 8, then

(i) What is the atomic number of the atom?

(ii) What is the charge on the atom?

Answer:

(i) Atomic number = Number of protons = 8

(ii) Number of protons = 8

Positive charge = 8

Number of electrons = 8

Negative charge = 8

Net charge = 8 + (–8)

= 0

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Complete the following table:

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Chapter 4 NCERT Class 9 Science SOLUTIONS

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Chapter 4 NCERT Class 9 Science SOLUTIONS

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More NCERT Questions

Complete the following table:

Which one of the following is a correct electronic configuration of sodium ? (a) 2,8 (b) 8, 2, 1 (c) 2, 1, 8 (d) 2, 8, 1

Number of valence electrons in Cl– ion are— (a) 16 (b) 8 (c) 17 (d) 18

Isotopes of an element have (a) the same physical properties (b) different chemical properties (c) different number of neutrons (d) different atomic numbers

Rutherford’s alpha particle scattering experiment was responsible for the discovery of. (a) Atomic (b) Electron (c) Proton (d) Neutron

For the following statements, write T for true and F for false.

Composition of the nuclei of two atomic species X and Y are given below : Give the mass number of X and Y. What is the relation between the two species ?

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