Periodic Properties and Trends

Which of these elements has the greatest atomic radius? 

• H
• N
• Cl
• Cs

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.

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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 

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

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

Tags

NGSS.HS-PS1-1

What is the family name of this group of elements? 

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

Which element has 2 valence electrons? 

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

Tags

NGSS.HS-PS1-1