A. Increases
B. Decreases
C. Can not be predicted
D. Remains constant
0
The atoms of same element having same atomic number but different mass number are called____________________?
0
Which of the following ion is stable in aqueous solution ?
A. Isobars
B. Isomers
C. Isotopes
D. Isotropes
0
An element has electronic conviguration 1s2 2s2 2p2. It belongs to__________________?
A. H+
B. H-
C. Cl-
D. All are stable
0
The atomic radii decreases by increasing atomic number in________________?
A. Group II-A
B. Group IV-A
C. Group VII-A
D. Group VI-A
0
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 ?
Which one of the following sets consists of all coinage metals ?
A. Alkali metal
B. Alkaline earth metal
C. Elements from Li to Ne
D. Halogens
A. The nature of its oxides
B. The charge on its ions
C. The formula of its oxide
D. Its number of isotopes
0
Best position of hydrogen in the periodic table is above I.A Group which is mainly due to_______________?
A. Cu Hg Au
B. Cu Ag Au
C. Ag Au Hg
D. Cu Fe Au
0
Non-metals usually form _________________ oxides?
A. Both are electropositive
B. Similar outer most shell electronic configuration
C. Both form ionic compounds
D. All
0
Inner transition elements are called _________________?
A. Acidic
B. Amphoteric
C. Neutral
D. All of the above
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