Periodic Table to Classify Elements

Students collected data on five elements.

Their data are shown in the table.

Which element has the same number of energy levels as lithium?

• Beryllium

• Sodium

• Magnesium

• Potassium

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Which element has chemical properties that are most similar to the chemical properties of sulfur, S?

• Silicon, Si

• Chlorine, Cl

• Selenium, Se

• Phosphorous, P

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Which pair of elements are nonmetals and gases at room temperature and normal atmospheric pressure?

• Fluorine, F, and chlorine, Cl

• Boron, B, and aluminum, Al

• Hydrogen, H, and cesium, Cs

• Cobalt, Co, and nickel, Ni

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112.20.b.5.C

One of the properties that makes copper, Cu, useful for household wiring is its ability to conduct electricity. Which other element is most likely to conduct electricity?

• Gold, Au

• Radon, Rn

• Bromine, Br

• Nitrogen, N

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112.20.b.5.C

A scientist performs tests on a sample of an element. The element is a shiny solid that conducts electricity and heat. The scientist is able to bend and flatten the sample when pressure is applied to it.

Based on this information, the element could NOT be a member of which group on the periodic table?

• Group 2

• Group 8

• Group 12

• Group 18

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112.20.b.5.C

How many valence electrons are in an atom of each element in Group 15 in the periodic table?

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112.20.b.5.C

Four students were asked to complete a table for a science assignment. Each student selected one chemical element from each of four groups in the periodic table and then classified each element as a metal, a nonmetal, or a metalloid.

Which table was completed correctly?

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112.20.b.5.C

Students were asked to identify the location of elements in the periodic table based on clues printed on game cards.

Based on the data, which periodic table shows the correct location of the four elements?

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112.20.b.5.C

Elements in Group (a)   are gaseous at room temperature and chemically stable.

• 18
• 1
• 4
• 12

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112.20.b.5.C

Element R and Element Q have the same number of valence electrons. These elements both have similar chemical behavior, but Element R has fewer energy levels than Element Q.

Which statement best describes the positions of the two elements in the periodic table?

• The two elements are in the same period, with Element R the first element in the period and Element Q the last element

• The two elements are side by side in the same period, with Element Q to the left of Element R

• The two elements are in the same group, with Element R just above Element Q

• The two elements are in the same group, with Element Q at the top of the group and Element R at the bottom

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112.20.b.5.C