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Chemistry-day-9 atoms-molecules-questions Target ssc cgl 2018

Chemistry-day-9 atoms-molecules-questions Target ssc cgl 2018

Chemistry-day-9 atoms-molecules-questions Target ssc cgl 2018

Q1. The atomic number of carbon is 6 and its atomic mass is 12. How many are there protons in the nucleus of carbon?





Q2. The number of neutrons present in an element having mass number 226 and atomic number 88 is:





Q3. An atom of an element has atomic number 17 and mass number 36. The number of neutrons in its nucleus is





Q4. The mass number of a nucleus is

(a)always less than its atomic number

(b)always more than its atomic number

(c)always equal to its atomic number

(d)more and sometimes equal to its atomic number..

Q5.  The chemical behavior of an atom depends upon

(a)the number of protons in its nucleus

(b)the number of neutrons in the nucleus

(c)the number of electrons orbiting around the nucleus

(d)the number of nucleons in the nucleus

Q6. What particles move around the nucleus of an atom and are negatively charged?





Q7. When there are two electrons in the same orbital, they have:

(a)same spin

(b)opposite spin..

(c)same or opposite spin

(d)no spin

Q8. “All the four quantum numbers of two electrons in an atom are not the same,” It is the law of —


(b)Exclusion Principle of Pauli

(c)Uncertainty Principle of Hiesenberg

(d)Avogadro’s Law

Q9. The electronic configuration of an’ atom having atomic number‘20’ is

(a)2, 8, 10

(b)2, 6, 8, 4

(c)2, 8, 8, 2

(d)2, 10, 8

Q10. Which of the following is a mono atomic gas?






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