Atomic Radius

Multiple Choice

Which of the following is NOT typically considered a periodic trend in the periodic table?

• Atomic radius

• Ionization energy

• Electronegativity

• Molecular mass

Multiple Choice

What is the atomic radius?

• The distance from the nucleus to the outermost electron of an atom

• The number of protons in an atom

• The number of neutrons in an atom

• The mass of an atom

Fill in the Blanks

This atom would be in which PEL (principal energy level)

Draw

Draw the PEL levels for Calcium

Fill in the Blanks

Atomic radius increases as you move

a group in the periodic table.

Multiple Choice

What causes electrostatic attraction between subatomic particles?

• Opposite charges

• Like charges

• Same number of protons and electrons

• Presence of neutrons

Multiple Choice

As you move from right to left across a period, what happens to the atomic radius?

• It increases

• It decreases

• It remains the same

• It fluctuates unpredictably

Open Ended

Explain why the atomic radius increases across a period from right to left in the periodic table.

Multiple Choice

Which of the following statements best describes the trend of atomic radius in the periodic table?

• Atomic radius increases down a group and decreases across a period.

• Atomic radius decreases down a group and increases across a period.

• Atomic radius increases both down a group and across a period.

• Atomic radius decreases both down a group and across a period.

Multiple Choice

Which element has the largest atomic radius according to the periodic table representation?

• Cesium (Cs)

• Fluorine (F)

• Hydrogen (H)

• Helium (He)

Multiple Choice

Which is larger? Na or Mg?

• Na

• Mg

Fill in the Blanks

The element with the

atomic radius in the periodic table is Cesium.

Open Ended

How do periodic trends such as atomic radius, ionization energy, and electronegativity help us understand the properties of elements in the periodic table?

Multiple Choice

Which of the following periodic trends increases as you move from left to right across a period in the periodic table?

• Atomic radius

• Metallic character

• Ionization energy

• None of the above