Periodic Table Quiz

An element that is a very reactive gas is most likely a member of the...

• noble gases

• alkali metals

• halogens

• actinides

Which of the following metals is most reactive?

• Sodium (Na)
• calcium (Ca)
• titanium (Ti)
• All metals have the same reactivity

The noble gases have ____ electrons in their outer energy levels.

• few
• about a half-complete set of
• an almost complete set of
• a complete set of

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Elements in a family or group in the periodic table often share similar properties because...

• they look alike.
• they are found in the same place on Earth.
• they have the same physical state
• their atoms have the same number of electrons in their outer energy level

Alkali metals are the most reactive of all the metals because they have ____ electron(s) in their outer energy level.

• 1
  
• 2
• 7
• 8

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Why would you NOT want to handle alkali metals with your bare hands?

• Alkali metals are acidic and can corrode the skin.
• Alkali metals are gases at room temperature.
• Alkali metals can react with the moisture on your hands and burn your skin.
• Alkali metals are toxic and can be absorbed through your skin.

Which of the following are properties of alkali metals (think back to the demo video)?

• brittle (hard), very reactive

• shiny, soft, reactive

• unreactive, not shiny

• somewhat shiny, brittle (hard)

Why is hydrogen placed above Group 1 in the periodic table?

• Like Group 1 metals, hydrogen is a metal soft enough to be cut with a knife.
• Like atoms of Group 1 metals, hydrogen atoms have only one electron in their outer level.
• Hydrogen has the same atomic mass as Group 1 metals.
• Hydrogen has the same density as Group 1 metals.

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Electrons are found in the third energy level for which of the following elements:

• Hydrogen

• Aluminum

• Boron

• Lithium

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T or F: Elements in the 18th column are unreactive.

• True

• False

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