A. Al-Razi
B. Moseley
C. Dobereiner
D. Democritus
Related Mcqs:
- Elements in the same vertical group of the periodic table have same_______________?
A. Number of valence electrons
B. Atomic number
C. Atomic mass
D. Atomic volume - Periodic table provides a basic framework to study elements with respect to their__________________?
A. Physical properties
B. Chemical properties
C. Properties of their compounds
D. All - In modern periodic table all the leements are arranged in ascending order of__________________?
A. Valency
B. Atomic mass
C. Atomic number
D. Valence electrons - Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
A. Both are electropositive
B. Similar outer most shell electronic configuration
C. Both form ionic compounds
D. All - Many properties of an element and its compounds can be predicted from the position of the element in the periodic table. What property could not be predicted in this way ?
A. The nature of its oxides
B. The charge on its ions
C. The formula of its oxide
D. Its number of isotopes - The longest period in the modern periodic table is___________________?
A. 6th
B. 7th
C. 2nd and 3rd both
D. 5th - Modern periodic table has been divided in ___________ blocks?
A. 2
B. 4
C. 8
D. 7 - Which one of the following pairs shown diagonal relationship in the periodic table ?
A. Sodium and Lithium
B. Lithium and magnesium
C. Lithium and beryllium
D. Boron and Beryllium - In whole Periodic Table which element Is Most Reducing Agent ?
A. Chlorine
B. lithium
C. Helium
D. NeonSubmitted by: Ali Jan
- Which one of the following is not a periodic property ?
A. Melting point of elements
B. Boiling point of elements
C. Ionization energy of elements
D. Coordination number of ions