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Transcript of Diatomic Nonmetals
By: Jennifer Lee
Valence Electrons in Diatomic Nonmetals: Reactivity
3 Physical Properties of Diatomic Nonmetals
1) Lower melting and boiling points
2) Mostly gaseous
3) Higher volatility.
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There are 7 diatomic nonmetals in the periodic table.
3 Chemical Properties of Diatomic Nonmetals
1) High ionization energy
2) High electronegativity.
3) Less tendency of Catenation.
A Closer Look at 3 Diatomic Nonmetal Elements
Atomic Number: 17
Melting point: -100.98 °C
Boiling point: -34.6 °C
Appearance: Greenish yellow gas.
Uses: -Used as a bleach in the manufacture of paper and cloth.
-Used to make pesticides and rubber.
-Used in drinking water and swimming pool water to kill harmful bacteria.
Nonmetals-An element or substance that is not a metal. Characteristics include poor conductor of electricity, poor conductor of heat, dull, and brittle.
Diatomic-Consisting of two atoms
Atomic number: 7
Melting point: -209.9 °C
Boiling point: -195.8 °C
Appearance: At room temperature, it is a colorless and odorless gas.
Uses: -Makes up 78% of the earth’s atmosphere and is essential for life since it is part of DNA
-Needed for protein and many other components of the living cell.
-Used to make fertilizer, plastics, dyes, and explosives.
Atomic number: 8
Melting point: -218.4 °C
Boiling point: -183.0 °C
Appearance: A colorless, odorless gas that makes up 21% of the atmosphere.
The elements in this category are all reactive because they either have 1, 5, 6, or 7 valence electrons. This means they only have to lose 1 electron, gain 3 electrons, gain 2 electrons, or gain 1 electron in order to have a full valence shell.
Uses: -Essential for all forms of life since it is a constituent of DNA
-We breathe in oxygen so that it can react with energy stores in our bodies to provide the heat and motion that keeps us alive, and we return it to the atmosphere as carbon dioxide.
-It accounts for 89% of the mass of water and makes life in rivers, lakes and oceans possible.
-Industrially, oxygen is used for steelmaking, metal cutting, and in the chemicals industry.
Trees produce oxygen!
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Watch this video to find out how to remember what the diatomic nonmetals are!