Periodic Table Trends

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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NGSS.HS-PS1-1

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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NGSS.HS-PS1-1

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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NGSS.HS-PS1-2

The ionization potential of an element is the amount of energy required to remove an electron from an isolated atom or molecule. According to the periodic table, which of the following indicates the correct decreasing order of ionization energy?

• Li > Na > K > Cs
• Na > K > Li > Cs
• Li > K > Na > Cs 
• Cs > K > Na > Li 

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

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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NGSS.HS-PS1-2

The number of valence electrons in an element affects the reactivity of that element. Which element listed has the fewest valence electrons?

• beryllium (Be)
• sodium (Na) 
• oxygen (O) 
• neon (Ne)

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NGSS.HS-PS1-1

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What is the family name of this group of elements? 

• Alkali metals 
• Halogens 
• Noble Gases 
• Alkali Earth Metals 

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NGSS.HS-PS1-1

How many Valance electrons does Iodine Have?

• 6
• 16
• 7
• 17

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NGSS.HS-PS1-1

Which element has 2 valence electrons? 

• cesium (Cs) 
• magnesium (Mg)
• boron (B)
• argon (Ar) 

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