Chapter 6 Periodic Table Review

Moseley's research suggested that elements should be sorted by increasing atomic — A. mass B. number C. radius D. stability

• mass

• number

• radius

• stability

Classify the following as either a metal, metalloid or a nonmetal:

1. Si

2. Na

3. Al

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Which periodic family has a full outermost valence shell and rarely reacts with other elements?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

From which of the following atoms would it be the most difficult to remove an electron?

• Sodium

• Aluminum

• Sulfur

• Chlorine

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Students are conducting an experiment to identify an unknown solid.

Observations of Unknown Solid:

Malleable, and soft enough to cut with a knife.

Reacts explosively with water

Displays a yellow flame when exposed to a Bunsen burner flame.

Based on these observations, which is the best prediction for the identity of the unknown?

• chromium

• lead

• sodium

• strontium

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NGSS.HS-PS1-2

Which family correctly represents the elements in Group 1 on the Periodic Table?

• Transition metals

• Alkali metals

• Lanthanide elements

• Actinide series

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Which of these elements is the most electronegative?

• argon

• chlorine

• phosphorus

• sulfur

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Which of these statements accurately describes the trend of ionic energies or atomic radii in the Periodic Table?

• The atomic radius increases from top to bottom in a group.

• The atomic radius increases from left to right across a period.

• The ionic energies increase from right to left across a period, and bottom to top in a group.

• The ionic energies increase left to right across a period and from top to bottom in a group.

Which element is most likely to ionize by losing two electrons?

• Beryllium

• Helium

• Lithium

• Oxygen

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Which of the following elements has the largest atomic radius?

• Calcium

• Sodium

• Potassium

• Magnesium