Chemistry Week 8 Quiz

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Period

• 1
• 2
• 3
• 4
• 5

Which of the following is a more reactive metal in period 3. Aluminum or Magnesium

• Aluminum
• Magnesium

Which is the most reactive alkaline earth metal?

• Magnesium
• Calcium
• Strontium
• Barium

What is the trend for ionization energy as you move from left-to-right across a period? ion

• Increases left to right
• decreases left to right

What is ionization energy?

• Attraction of protons toward the nucleus
• Attraction of electrons toward the nucleus
• Amount of energy required to remove an electron
• Amount of energy required to remove a protn

A portion of the periodic table of elements is shown below. Based on their relative positions, what conclusion can be drawn about these metallic elements?

• All the elements have the same reactivity.
• Potassium is much more reactive than iron.
• Chromium is twice as reactive as vanadium.
• Calcium is much less reactive than scandium.

The ionization energy (energy to remove an electron) for sodium (Na) is greater than that for potassium (K). Which of the following statements best explains the difference in ionization energy for these two elements?

• The atomic radius of potassium is smaller than that of sodium, and its valence electrons are subject to less nuclear pull.
• The atomic radius of potassium is smaller than sodium, and its valence electrons are subject to more nuclear pull.
• The atomic radius of potassium is larger than that of sodium, and its valence electrons are subject to less nuclear pull.
• The atomic radius of potassium is larger than that of sodium, and its valence electrons are subject to more nuclear pull.

The most reactive metals are the

• alkali metals
• alkaline earth metals
• transition metals