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Standard VIII

Chemistry

Atomic Number

An atom has 1...

Question

An atom has 17 electrons, 17 protons, 18 neutrons. Therefore which of the following is/are true?
(a) Its atomic number is 17
(b) Its mass number is 35

Only (a)

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Only (b)

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(a) and (b)

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Neither (a) nor (b)

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Solution

The correct option is C (a) and (b)
Option: (c)

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Similar questions

Q. Question 17
Which of the following statement is always correct?

(a) An atom has equal number of electrons and protons
(b) An atom has equal number of electrons and neutrons
(c) An atom has equal number of protons and neutrons
(d) An atom has equal number of electrons, protons and neutrons

Q. An atom X has a mass number of 35 and contains 17 electrons. Find the number of protons, electrons, and neutrons, along with the atomic number of the ion X

^{-}

Q. An element has atomic number

17

and mass number

37

. There are

17

electrons outside the nucleus. Find the number of neutrons in it.

If an atom of an element contains 17 electrons and 18 neutrons, find the number of protons, atomic number and mass number of the element.

Fill in the blanks in the following statements :

(a) The number of protons in the nucleus of an atom is called its ....................

(b) The total number of protons and neutrons in the nucleus of an atom is called its ....................

(d) An atom of an element has 11 protons, 11 electrons and 12 neutrons. The atomic mass of the atom is ....................

(e) If the nucleus of an atom has atomic number 17, mass number 37 and there are 17 electrons outside the nucleus, the number of neutrons in it is ....................

(f) Almost all the mass of an atom is concentrated in a small region of space called the ....................

(g) Cathode rays are a beam of fast moving ....................

(h) The anode rays obtained from hydrogen gas consist of particles called ....................

(i) The maximum number of electrons that can be accommodated in L shell are ....................

(j) The maximum number of electrons that can go into the M shell is ....................

(k) The subatomic particle not present in a hydrogen atom is ....................

(l) The electron has .................... charge, the proton has .................... charge, and the neutron has .................... charge.

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An atom has 17 electrons, 17 protons, 18 neutrons. Therefore which of the following is/are true? (a) Its atomic number is 17 (b) Its mass number is 35

The correct option is C (a) and (b) Option: (c)

An atom has 17 electrons, 17 protons, 18 neutrons. Therefore which of the following is/are true?
(a) Its atomic number is 17
(b) Its mass number is 35

The correct option is C (a) and (b)
Option: (c)