NCERT Classification Element electronic Configuration,NEET MCQ,PDFs

1. A plot of $\sqrt{ν}$ against atomic number (Z) gave a straight line and not the plot of $\sqrt{ν}$ against atomic mass. Which of the following scientist observed such regularities in the characteristics X-ray spectra of the element?

(a) Dmitri Mendeleev
(b) Henry Moseley
(c) A. E. B. de Chancourtois
(d) Alexander New lands

2. Henry Moseley showed that the ‘P’ is a more fundamental property of an element than its ’Q’. By completing the sentence, identify ‘P’ and ‘Q’.

(a) P – atomic mass. Q – atomic number
(b) P – atomic number, Q – atomic mass
(c) P – atomic number, Q – atomic volume
(d) P – atomic volume, Q – atomic mass

3. The physical and chemical properties of the elements are periodic functions of their

(a) volume
(b) densities
(c) atomic masses
(d) atomic numbers

4. According to the recommendation of International Union of Pure and Applied Chemistry, the groups are numbered from

a) 1 to 7
(b) 1 to 18
(c) 0 to18
(d) 0 to 7

5. The period number corresponds to which quantum number?

(a) Azimuthal quantum number
(b) Magnetic orbital quantum number
(c) Principal quantum number
(d) Electron spin quantum number

6. Seaborg was awarded the Nobel Prize in Chemistry for his work. What name has been given to an element in his honour?

(a) Tantalum
(b) Molybdenum
(c) Indium
(d) Seaborgium

7. How many total elements are present in fourth and fifth period in the periodic table respectively?

(a) 18 and 32
(b) 32 and 32
(c) 18and 18
(d) 8and 18

8. What Is the IUPAC official name of element with atomic number 101?

(a) Nobel aim
(b) Bohrium
(c) Mendelevium
(d) Lawrencium

9. What is the symbol of the element Meitnerium?

(a) Md
(b) Mt
(c) Mo
(d) Mn

10. What is the symbol of the element which belongs to group 15 and period 3?

(a) P
(b) As
(c) N
(d) Sb

11. How many total number of elements present collectively in group 1 and group 2?

a) 16
(b) 18
(c) 20
(d) 14

12. What are the group number and period number respectively of element Darmstadtium (Ds)?

(a) 10 and 7
(b) 11 and 7
(c) 9 and 6
(d) 8 and 6

13. How many total elements are present in periods 3 and 4 collectively?

(a) 26
(b) 36
(c) 16
(d) 28

14. Match the column I with column II and choose the correct code given below:

Column I—- Column II
Name of the element—– Symbol of the element
(P) Livermorium (I) Db
(Q) Lawrencium (II) Lv
(R) Dubnium (III) Lr

(a)(P) (iii)Q– (ii). R – (i). S – (iv)
(b)(P) (ii).Q — (iii)R (iv)S — (I)
(c)(P) (ii) Q– (iii) R- (i) S- (iv)
(d)(P) (iii) Q (ii) R—(iv) S– (i)

15. Name the element which belongs to group 18 and period 4.

(a) Kr
(b) Xe
(c) Rn
(d) Ar

16. Which of t he following elements does not belongs to the actinoid series?

(a) Curium (Z – 96)
(b) Californium (Z – 98)
(c) Uranium (Z – 92)
(d) Terbium (Z – 65)

17. The period number In the long form of the periodic table is equal to

(a) maximum principal quantum number of any element of the period.
(b) magnetic quantum number of any element of the period.
(c) maximum Azimuthal quantum number of any element of the period
(d) atomic number of any element of the period.

18. Assertion: Henry Moseley observed regularities in the characteristic X- ray spectra of element. A plot of $\sqrt{ν}$(ν is frequency.) against atomic number (Z) gave a straight line.
Reason: Henry Moseley showed that the atomic number is a more fundamental property of an element than its atomic mass.

(a) Both A and R are true and R is die correct explanation of A.
(b) Both A and R are true but R is not the correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false

19. Assertion: The period number corresponds to the highest principal quantum number (n) of die elements in the period.
Reason: The horizontal rows are called periods and the vertical column, groups.

(a) Both A and R are true and R is die correct explanation of A.
(b) Both A and R are true but R is not die correct explanation of A.
(c) A is true but R is false.
(d) Both A and R are false