The atoms of same element having same atomic number but different mass number are called____________________?
A. Isobars
B. Isomers
C. Isotopes
D. Isotropes
Periodic Classification
Which of the following ion is stable in aqueous solution ?
Which of the following ion is stable in aqueous solution ?
A. H+
B. H-
C. Cl-
D. All are stable
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
A. Group II-A
B. Group IV-A
C. Group VII-A
D. Group VI-A
The atomic radii decreases by increasing atomic number in________________?
The atomic radii decreases by increasing atomic number in________________?
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens
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 ?
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
Which one of the following sets consists of all coinage metals ?
Which one of the following sets consists of all coinage metals ?
A. Cu Hg Au
B. Cu Ag Au
C. Ag Au Hg
D. Cu Fe Au
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
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
Non-metals usually form _________________ oxides?
Non-metals usually form _________________ oxides?
A. Acidic
B. Amphoteric
C. Neutral
D. All of the above
Inner transition elements are called _________________?
Inner transition elements are called _________________?
A. Lanthanides
B. Actinides
C. Rare earth metals
D. All
In modern periodic table all the leements are arranged in ascending order of__________________?
In modern periodic table all the leements are arranged in ascending order of__________________?
A. Valency
B. Atomic mass
C. Atomic number
D. Valence electrons