Unit 5 Review

Which element is classified as a Halogen?

• Neon (Ne)

• Chlorine (Cl)

• Oxygen (O)

• Calcium (Ca)

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Chlorine tends to form a(n) ____ with a ____ charge.

• cation, +1

• anion, −1

• cation, −1

• anion, +2

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When sulfur becomes an ion, it will ____ and form a ____ charge.

• gain electrons; −2

• lose electrons; +2

• gain electrons; +2

• lose electrons; −2

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Elements in the same column (group) share similar chemical behaviors because they have the same number of:

• energy levels

• valence electrons

• protons

• neutrons

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An element that is brittle, dull, and does not conduct electricity is most likely a:

• Metal

• Transition Metal

• Metalloid

• Nonmetal

Which element is most chemically similar to Calcium (Ca)?

• Magnesium (Mg)

• Potassium (K)

• Sulfur (S)

• Scandium (Sc)

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The number of valence electrons determines how an element:

• reacts with other elements

• changes its mass

• emits light

• gains neutrons

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The modern periodic table arranges elements by increasing atomic number, an idea proposed by:

• Mendeleev

• Bohr

• Moseley

• Dalton

Which type of element is typically lustrous, ductile, and a good conductor?

• Nonmetal

• Metalloid

• Metal

• Halogen

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An atom of Gallium (Ga) typically forms an ion with what charge?

• +1

• +3

• −3

• +5

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