Trends in the Periodic Table

Which of these elements has the greatest atomic radius?

• H

• N

• Cl

• Cs

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The Periodic Table of the Elements is useful for revealing patterns and trends in the elements. Which statement accurately describes a pattern in the size of atomic radii in the Periodic Table of the Elements?

• Atomic radii decrease from left to right across a period and decrease from top to bottom in a group.
• Atomic radii increase from left to right across a period and increase from top to bottom in a group.
• Atomic radii decrease from left to right across a period and increase from top to bottom in a group.
• Atomic radii increase from left to right across a period and decrease from top to bottom in a group.

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The symbols W, X, Y, and Z represent four elements shown on the outline of a periodic table.
Which element has the highest electronegativity?

• W
• X
• Y
• Z

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Fluorine, chlorine, bromine, and iodine all have the same number of valence electrons and have a tendency to gain electrons. Which element has the greatest ionization energy and electronegativity?

• fluorine
• chlorine 
• bromine 
• iodine 

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Based on their locations in the periodic table, which element has chemical properties most similar to those of calcium, Ca?

• beryllium, Be

• potassium, K

• titanium, Ti

• yttrium, Y

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Metals have the largest - 

• atomic radius and electronegativity
• electronegativity and ionization energy
• atomic radius only
• ionization energy and atomic radius

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As you move down the periodic table atoms get bigger.  This is because ____________.

• The atoms have more mass.
• The atoms have more protons.
• The atoms have more energy levels
• The atoms have more neutrons

Ionization energy is...

• the energy required to add an electron to a specific atom
• how much energy it takes to remove an electron from an atom
• the energy required to shield the outer electrons from the nucleus
• a measure of the ability of an atom to attract electrons

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The common charge on an atom in group 17 would be....

• +1

• +7

• -7

• -1

• 17

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What BEST DESCRIBES the process by which an atom or a molecule acquires a negative or positive charge by gaining or losing electrons?

• Polarity

• Affinity

• Ionization

• Discharge

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