Periodic Trends Lesson

Periodic Trends Lesson

by Andrew Baldwin

Poll

Rate your confidence.

• I can explain the other notes to other students if needed. 

• I understand the other notes.

• I completed the other notes but I am not sure how to tie it together.

• I haven't Completed the other notes

Multiple Choice

Which element has the smaller atomic radius: potassium (K) or bromine (Br)?

• potassium (K)

• bromine (Br)

Multiple Choice

Which element has the greatest ionization energy: Aluminum (Al)    or    Chlorine (Cl)?

• Aluminum (Al)

• Chlorine (Cl)

Multiple Choice

Which element has the greatest electronegativity: Nitrogen (N) or Arsenic (As)?

• Nitrogen (N)

• Arsenic (As)

Multiple Choice

Which group of the periodic table is composed of inert (not reactive)  gases?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Multiple Choice

As you move down a group, atomic radius increases because - 

• you add more and more neutrons

• you add more and more protons

• you add more and more shells (energy levels)

• you add more atomic mass

Multiple Choice

The atom with the largest atomic radius in Group 18 is - 

• Ar

• He

• Kr

• Rn

Multiple Choice

As you move across the periodic table from left to right, the atomic radius decreases.  This is because - 

• the number of protons increases, so attraction to electrons increases

• the number of energy levels increases

• the number of electrons increases

• the atomic mass increases

Multiple Choice

Francium (Fr) has the lowest ionization energy in Group 1 because - 

• it has the smallest number of valence electrons

• it has the greatest atomic mass

• it has the greatest number of protons, so it attracts its electrons the strongest

• its 1 valence electron is very far from the nucleus, so little energy is needed to remove it

Multiple Choice

Families all have similar 

• Names

• atomic numbers

• atomic masses

• properties

Multiple Choice

Which has the greater Electronegativity:  H or F?

• H

• F