Atomic radius is expressed in
the unit __________.

Down the group, no. of shell
________.

Left to right in a period, metallic character ________.

Down the group, Atomic size
________.

Down the group, valency
________.

Left to right in a period,
Valency ________.

General formula of halogen
family is ____.

Which of the following is
correct?

Water is boiled to convert into
steam and condenses _______
to ________ again.

Chemical energy in the coal
convert into ____ energy in
turbine.

____ may cause respiratory
disorders.

Which of the following gases
released in the thermal power
plant?

Coal are ______ .