Right or Wrong, Science I, SSC, 10th Maharashtra,
Write right or wrong. If wrong, write the correct sentence.
Chapter No. 2: Periodic Classification of Elements.
According to Mendeleev's periodic table eka - silicon was later discovered and named as germanium (Ge).
Ans. Right.
Hydrogen resembles alkali metals as well as halogens.
Ans. Right.
The valency of noble gases is one.
Ans. Wrong.
Reason: The valency of noble gases is zero.
Atomic radius decreases while going down in a group.
Ans. Wrong.
Reason: Atomic radius increases while going down in a group.
Silicon is a nonmetal.
Ans. Wrong.
Reason: Silicon is a metalloid.
Bromine (Br2) exists as gas at room temperature.
Ans. Wrong.
Bromine (Br2) exists as liquid at room temperature.
The noble gas with the smallest atomic radius is helium.
Ans. Right.