Periodic Table Trends Retest

Sodium (Na) and potassium (K) are in the same group on the periodic table. Based on their locations, which statement about sodium and potassium is true?

• Sodium is less electronegative than potassium. 
• Sodium has fewer energy levels than potassium. 
• Sodium has a larger ionic radius than potassium. 
• Sodium has lower ionization energy than potassium. 

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Which of these elements has the greatest atomic radius? 

• H
• N
• Cl
• Cs

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Which statement accurately describes a pattern in the size of atomic radii in the Periodic Table of the Elements?

• Atomic radius decreases from left to right across a period and decreases from top to bottom in a group.

• Atomic radius increases from left to right across a period and increases 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.

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-PS1-1

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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

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-PS1-1

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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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According to the Periodic Table of the Elements, which set of elements has similar properties?

• H, C, I
• He, H, Al
• He, Ne, Ar
• Na, Ca, Al

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NGSS.HS-PS1-1

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Which of the following will have a lower ionization energy than copper (Cu)?

• Helium (He)

• zinc (Zn)

• Calcium (Ca)

• bromine (Br)

Which atom has the largest atomic radius?

• chlorine

• carbon

• phosphorus

• fluorine