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Chemical Symbols of Elements

Ifnumber of e...

Question

Ifnumber of electrons in an atom is 8 and number of protons is also 8,then (i) what is the atomic number of the atom and (ii) what is thecharge on the atom?

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Solution

(i) The atomic number is equal to the number of protons. Therefore,the atomic number of the atom is 8.
(ii) Since the number of both electrons and protons is equal,therefore, the charge on the atom is 0.

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Q. Question 1
If number of electrons in an atom is 8 and number of protons are also 8, then (i) what is the atomic number of the atom? and (ii) what is the charge on the atom?

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 and (ii) what is the charge on the atom?

Q. If number of electrons in an atom is 8 and number of protons is also 8, then give the atomic number of atom and the charge on the atom.

Q. (i) Describe the Rutherford's model of an atom. State one drawback of Rutherford's model of the atom.
(ii) The mass number of an element is 23 and it contains 11 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?

Q. Question 6
Which of the following are true for an element?
(i) Atomic number = number of protons + number of electrons
(ii) Mass number = number of protons + number of neutrons
(iii) Atomic number = number of protons = number of neutrons
(iv) Atomic number = number of protons = number of electrons

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iii)
(d) (ii) and (iv)

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