Periodic Table Trends - Atomic/Ionic Radii

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. 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of these elements has the greatest atomic radius? 

• H
• N
• Cl
• Cs

Tags

NGSS.HS-PS1-1

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.

Tags

NGSS.HS-PS1-1

Which of these elements has an electron structure most similar to that of element X?

• 1
• 2
• 3
• 4

Tags

NGSS.HS-PS1-1

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

Tags

NGSS.HS-PS1-1

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)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the family name of this group of elements? 

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

Tags

NGSS.HS-PS1-1

Which element has 2 valence electrons? 

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

Tags

NGSS.HS-PS1-1

How many Valance electrons does Iodine Have?

• 6
• 16
• 7
• 17

Tags

NGSS.HS-PS1-1

Which atom has the largest atomic radius?

• potassium
• rubidium 
• francium
• cesium

Tags

NGSS.HS-PS1-1