A. Atomic weights
B. Atomic numbers
C. Number of protons
D. Number of electrons
Related Mcqs:
- When the difference between mass number and atomic number of atoms of two or more elements are same, the atoms are termed as____________________?
A. Isomers
B. Isotopes
C. Isobars
D. Isotones - Isotopes of an element have the same__________________?
A. Number of neutrons
B. Mass number
C. Electronic configuration
D. Atomic weight - Isotopes of an element have different_____________________?
A. Mass number
B. Electronic configuration
C. Nuclear charge
D. Chemical properties - Isotopes of an element have different_________________?
A. Mass number
B. Electronic configuration
C. Nuclear charge
D. Chemical properties - How many atoms are present in one gm-atom of an element ?
A. 2 × 1023
B. 6 × 1023
C. 6 × 1032
D. 5 × 105 - The atomic weight and atomic number of an element are A and Z respectively. What is the number of neutrons in the atom of that element ?
A. A + Z
B. A – Z
C. A
D. Z - The half life period of a radioactive element is 100 days. After 400 days, one gm of the element will be reduced to ______________ gm?
A. 1/4
B. 1/8
C. 1/2
D. 1/16 - Which of the following isotopes is not present in natural uranium?
A. U-238
B. U-234
C. U-235
D. U-232 - Hydrogen has ______________ isotopes?
A. No
B. One
C. Two
D. Three - Artificially produced radioactive isotopes are used for____________________?
A. Power generation
B. Treatment of certain diseases
C. Initiating nuclear fission and fusion
D. All A., B. and C.