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Periodic Table/Emily

TermDefinition
Periodic Table The chart scientists use to organize and classify all the known elements.
Element A pure substance that cannot be broken down into simpler substances by chemical reactions.
Element Symbol An abbreviation or short representation of a chemical element; the symbols in the periodic table. Natural elements all have chemical symbols of one or two letters; some manmade elements have three-letter symbols.
Atomic Number The number of protons in the nucleus of an atom; atomic number determines the chemical properties of the atom.
Atomic Mass The combined mass of all of the protons and neutrons of an atom. Since each proton and neutron has a mass of approximately one unit (called an atomic mass unit) the atomic mass is approximately equal to the number of protons and neutrons.
Period In the periodic table of the elements, elements are arranged in a series of rows (or periods) so that those with similar properties appear in a column.
Group In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered.
Family In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered.
Chemical Formula A set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound.
Metals A shiny, dense substance that easily conducts heat and electricity.
Nonmetals An element or substance that is not a metal.
Metalloids An element whose properties are intermediate between those of metals and solid nonmetals.
Noble Gases one of six elemental gasses that does not naturally react with other elements
Reactivity
Dmitri Mendeleev
Trend
Energy Level
Valence Electrons
Chemical Property
Physical Property
Periodic Table The chart scientists use to organize and classify all the known elements.
Element A pure substance that cannot be broken down into simpler substances by chemical reactions.
Element Symbol An abbreviation or short representation of a chemical element; the symbols in the periodic table. Natural elements all have chemical symbols of one or two letters; some manmade elements have three-letter symbols.
Atomic Number The number of protons in the nucleus of an atom; atomic number determines the chemical properties of the atom.
Atomic Mass The combined mass of all of the protons and neutrons of an atom. Since each proton and neutron has a mass of approximately one unit (called an atomic mass unit) the atomic mass is approximately equal to the number of protons and neutrons.
Period In the periodic table of the elements, elements are arranged in a series of rows (or periods) so that those with similar properties appear in a column.
Group In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered.
Family In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. There are 18 numbered groups in the periodic table, but the f-block columns (between groups 2 and 3) are not numbered.
Chemical Formula A set of chemical symbols showing the elements present in a compound and their relative proportions, and in some cases the structure of the compound.
Metals A shiny, dense substance that easily conducts heat and electricity.
Nonmetals An element or substance that is not a metal.
Metalloids An element whose properties are intermediate between those of metals and solid nonmetals.
Noble Gases one of six elemental gasses that does not naturally react with other elements
Reactivity
Dmitri Mendeleev
Trend
Energy Level
Valence Electrons
Chemical Property
Physical Property
Created by: EmiRob2020
 

 



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