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Byju's Answer

Standard IX

Chemistry

Compounds

A neutral ato...

Question

A neutral atom ‘X’ with a mass number of 19 contains 10 neutrons. What is the valency of ‘X’?

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Solution

The correct option is A 1

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Similar questions

Q. An element ‘X’ has a mass number 19 and contains 10 neutrons. What is the valency of ‘X’?

Q. A neutral atom of fluorine has a mass number of

19

and an atomic number of

9

. How many neutrons does it have?

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

State which of the following is correct :

A neutral atom, atomic number 33 and atomic mass 75, contains :

(1) 75 neutrons
(2) 42 electrons
(3) 33 protons

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