How are elements in the periodic table organized?

• Most reactive to least reactive

• Based on physical and chemical properties

• Alphabetically

• Increasing number of electrons

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Russian chemist who developed a periodic table of elements & predicted the discovery of several new elements.

• Isaac Newton

• Dmitri Mendeleev

• Albert Einstein

• Stephen Hawking

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Most elements on the periodic table are classified as __________.

• Gases

• Metalloids

• Metals

• Nonmetals

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Groups on the periodic table are arranged

• Dimensionally

• Horizontally

• Diagonally

• Vertically

Groups tell the # of valance electrons elements in that group have. Vertical, tall columns-exclude transition metals.

• The A Groups

• The E Groups

• Alkali Metal Groups

• The Sections

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States that atoms lose, gain or share electrons in order to acquire a full set of eight valence electrons.

• Octet Rule

• Law of Conservation of Energy

• Archimedes' Principle

• Law of Conservation of Mass

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Electrons on the outermost energy level of an atom

• Outer Limits Electrons

• Atomic Electrons

• Particle Electrons

• Valence Electrons

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The ease and speed with which an element combines, or reacts, with other elements and compounds.

• Reactivity

• Resistance

• Conductivity

• Inactivity

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Which accurately describes nonmetals?

• Poor conductors of electricity

• Both malleable and ductile

• Often used in computer parts

• Always solid at room temperature

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Which group on the periodic table is the most reactive?

• Alkali metals

• Transition metals

• Alkaline-earth metals

• Halogens