The Periodic Table and Periodic Trends Review

Atomic number

• The number of protons in the nucleus of an atom

• a measure of the size of its atom

• formulated the first Periodic Law and created a farsighted version of the periodic table of elements that arranged elements by their properties and not atomic mass.

• Negatively charged particle that orbits the nucleus of an atom.

Atomic Radii

• The number of protons in the nucleus of an atom

• a measure of the size of its atom

• formulated the first Periodic Law and created a farsighted version of the periodic table of elements that arranged elements by their properties and not atomic mass.

• Negatively charged particle that orbits the nucleus of an atom.

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Dmitri Mendeleev

• The number of protons in the nucleus of an atom

• a measure of the size of its atom

• formulated the first Periodic Law and created a farsighted version of the periodic table of elements that arranged elements by their properties and not atomic mass.

• Negatively charged particle that orbits the nucleus of an atom.

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Electron

• The number of protons in the nucleus of an atom

• a measure of the size of its atom

• formulated the first Periodic Law and created a farsighted version of the periodic table of elements that arranged elements by their properties and not atomic mass.

• Negatively charged particle that orbits the nucleus of an atom.

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Electronegativity

• the arrangement of electrons in an atom

• a measure of the ability of an atom in a chemical compound to attract electrons

• reformulated the periodic table based on atomic number better fitting the periodic law and pattern seen by scientists.

• the energy required to remove an electron from an atom or ion

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Henry Moseley

• the arrangement of electrons in an atom

• a measure of the ability of an atom in a chemical compound to attract electrons

• reformulated the periodic table based on atomic number better fitting the periodic law and pattern seen by scientists.

• the energy required to remove an electron from an atom or ion

Ionization Energy

• the arrangement of electrons in an atom

• a measure of the ability of an atom in a chemical compound to attract electrons

• reformulated the periodic table based on atomic number better fitting the periodic law and pattern seen by scientists.

• the energy required to remove an electron from an atom or ion

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Periodic Group

• a region of an electron subshell where there is a high probability of finding electrons.

• a vertical column of elements in the periodic table; elements in the same group share chemical properties

• The physical and chemical properties of the elements are periodic functions of their atomic numbers

• a horizontal row of elements in the periodic table

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Periodic Law

• a region of an electron subshell where there is a high probability of finding electrons.

• a vertical column of elements in the periodic table; elements in the same group share chemical properties

• The physical and chemical properties of the elements are periodic functions of their atomic numbers

• a horizontal row of elements in the periodic table

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Periodic Period

• a region of an electron subshell where there is a high probability of finding electrons.

• a vertical column of elements in the periodic table; elements in the same group share chemical properties

• The physical and chemical properties of the elements are periodic functions of their atomic numbers

• a horizontal row of elements in the periodic table

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