871. Which of the following will not form crystalline structure with opporitely charged ions_________________?
A. H+
B. H-
C. Mg2+
D. Ca2+

872. 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

873. Concept of Triads was introduced by_______________?
A. Dobereiner
B. Newland
C. Mendeleev
D. Al-Razi

874. Elements with similar chemical properties appear in the_________________?
A. Same family
B. Same period
C. p block elements
D. Right upper corner

875. In modern periodic table all the leements are arranged in ascending order of__________________?
A. Valency
B. Atomic mass
C. Atomic number
D. Valence electrons

876. Inner transition elements are called _________________?
A. Lanthanides
B. Actinides
C. Rare earth metals
D. All

877. Non-metals usually form _________________ oxides?
A. Acidic
B. Amphoteric
C. Neutral
D. All of the above

878. 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

879. 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

880. 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