Which among the following elements have lowest value of IE1?
Pb
Sn
Si
C
Which of the following element is a metalloid?
Bi
Ge
What is the name of element with atomic number 105?
Kurchatovium
Dubnium
Nobelium
Holmium
Which of the following elements never show positive oxidation number?
O
Fe
Ga
F
KI and CusO4 solution when mixed, give :
CuI2 + K2SO4
Cu2I2 + K2SO4
K2SO4 + Cu2I2 + I2
K2SO4 + CuI2 + I2