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Refers to chemical similarities in the Periodic Table of elements of Period 2 to elements of Period 3 one group to the right, especially evident toward the left of the periodic table.

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Explosive limits

The range of concentrations over which a flammable vapour mixed with proper ratios of air will ignite or explode if a source of ignitions is provided.

Ostwald Process

A process for the industrial production of nitrogen oxide and nitric acid from ammonia and oxygen.

yttrium metal

Any of a subgroup of rare-earth elements, of which the cerium and terbium metals comprise the other two subgroups.

20 interesting chemistry facts

20 interesting chemistry facts.

Sublimation

The direct vaporization of a sold by heating without passing through the liquid state.

Group

A vertical column in the periodic table, also called a family.

Electrophile

Positively charged or electron-deficient.

Calorie

The amount of heat required to raise the temperature of one gram of water from 14.5°C to 15.5°C. 1 calorie = 4.184 joules.

Photon

A packet of light or electromagnetic radiation, also called quantum of light.

 

Period

The elements in a horizontal row of the periodic table.