22 Adv Unit 4 Review

The early periodic table organized the elements in periods of increasing atomic mass. What information is currently used to organize the elements on the periodic table?

• number of valence electrons 
• number of energy levels 
• atomic number 
• ionic radius 

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)

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

Which statement correctly and completely identifies a trend?

• Atomic radius decreases across a period and increases down a group.
• Electronegativity decreases across a period and decreases down a group.
• Ionization energy increases across a period and increases down a group.
• Ionic radius increases across a period and increases down a group.

Which is larger:

P or P^-3

• P

• P^-3

• both are same size

Which is larger:

Ca or Ca⁺²

• Ca

• Ca⁺²

• both are same size

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

Tags

NGSS.HS-PS1-2

The atom with the largest atomic radius in Group 18 is

• Ar
• He
• Kr
• Rn

The element with the largest electronegativity in the halogens is

• Cs
• F
• Fr
• O

The element with the lowest electronegativity is

• Cs
• F
• Fr
• O