Among metals which is the best conductor of electricity ?
Gold
Silver
Platinum
Rubidium
What is the melting point of Gallium ?
980 C
200 C
29.80 C
28.90 C
Complete : 4 Al + 3 O2 → ?
4 Al3O2
4 AlO3
2 Al2O3
2 Al3O2
When did Lothar mayer classified the elements ?
1860
1862
1864
1868
By whom the elements are classified into metals and non-metals ?
Dobereiner
Lavoisier
Mendeleev
Newland
Which is the lightest metal ?
Lithium
Osmium
Bromine
Which is the heaviest metal ?
Tungsten
In Mendeleev's periodic table, all the elements are sorted in the periodic functions of their :
Mass number
Atomic number
Atomic masses
Ionic number
Newland's classification of elements is termed as :
Triad
Law of octaves
Periodicity
Coinage
Bronze is formed by the combination of :
Copper and silver
Copper and tin
Silver and tin
Silver and gold
