Science M.C.Q

……… is used in balloons and in scuba diving.

The halogen which is liquid at room temperature is ………  

Eka-boron was subsequently named as ……..

The law of octaves was given by ……..

Noble gases belong to group …….. in modern periodic table.

Halogens belong to group …….. in the modern periodic table.

During Newlands time …….. elements were known.

which of the following ti-lads does not follow Dobereirier’s law of triads?

In which block of the modem periodic table are the nonmetals found?

Molecular formula of the chloride of an element X is XCl. This compound is a solid having high melting point. which of the following elements be present in the same group as X.

Alkaline earth metals have valency 2. This means that their position in the modern periodic table is in…….

The number of electrons in the outermost shell of alkali metals is…….

Atomic radius of Lithium is __________ pm

__________ is in liquid state at room temperature.

Electronic configuration of Mg is __________

First period consists of __________ elements.

__________ resembles alkali metals as well as halogens.

__________ triad does not follow Dobereiner's law of triad.

In which block of the Modern Periodic table are the non-metals found?

Molecular formula of the chloride of an element X is XCI. This compound is a solid having high melting point. Which of the following elements be present in the same group as X.

Alkaline earth metals have valency 2. This means that their position in the Modern Periodic table is in __________

The number of electrons in the outermost shell of alkali metals is __________