Chemistry Test - 69

Cathode rays are stream of electrons.

There are no option is correct.

The Element present in third period and seventeenth group of the periodic table is Chlorine and atomic number of Chlorine is 17.

Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature.

Chloroform, CHCl₃ is easily oxidised to the highly poisonous gas known as phosgene or carbonyl chloride COCl2_. Hence if it is used as anaesthetic it should be kept free from sunlight and air.

A bond formed by the transfer of electrons betwwen atoms of the elements is calledionic bond.

Argon is most the most abundant Rare Gas in the atmosphere. Its elemental symbol is Ar.

An amorphous or non-crystalline solid is a solid that lacks the long-range order that is characteristic of a crystal. In Brief, An amorphous solid is any noncrystalline solid in which the atoms and molecules are not organized in a definite lattice pattern. Such solids include glass, plastic, and gel.

Quartz glass (SiO2) is an amorphous solid due to its short range order of constituent particles. Note Quartz is a crystalline solid while quartz glass is an amorphous solid.

Group displacement law was given by Soddy and Fajan.

Helium has the highest First Ionization Energy in the Noble Gases group.