Unit Review - Atoms & the Periodic Table

Who created the periodic table?

• Mendeleev

• Dalton

• Rutherford

• Schrodinger

Which scientist developed the “plum pudding” model where electrons are spread through the atom randomly like plums in pudding?

• Dalton

• Thomson

• Rutherford

• Bohr

Which scientist discovered that the mass of an atom is concentrated at its positively charged nucleus, and the rest of the atom is mostly empty space?

• Rutherford

• Thomson

• Dalton

• Schrodinger

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Which scientist created the "planetary model" of the atom?

• Schrodinger

• Bohr

• Mendeleev

• Rutherford

Which scientist discovered that an atom has a central nucleus surrounded by an electron cloud, where the location of electrons can be predicted?

• Schrodinger

• Bohr

• Dalton

• Chadwick

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Which scientist discovered neutrons, particles in an atom's nucleus that have no charge?

• Chadwick

• Bohr

• Schrodinger

• Mendeleev

What do elements in the same group/column have in common?

• Melting point

• Color

• Number of energy shells

• Same properties

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What do elements in the same period/row have in common?

• Melting point

• Color

• Number of energy shells

• Properties

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What is the name for the elements in group 17 that are very reactive and have an almost-full valence shell?

• Halogens

• Noble Gases

• Alkali Metals

• Metalloids

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What is the name for the elements in group 18 that do not react with other atoms due to having a full outer shell?

• Halogens

• Noble Gases

• Alkaline Earth Metals

• Alkali Metals

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