Periodic Trends Lab (Page 3 of 3) in pdf

Periodic Trends Lab Page 3

Analysis and Conclusions:

1. Tape the graph of Atomic Radius vs. Atomic number into your lab notebook. Label the peaks and valleys

with the symbol or name of the element.

Under the graph answer the following questions in complete sentences.

a) Summarize trends for atomic radius across a period (left to right) and down a group (top to bottom).

b) Why does the atomic radius increase/decrease as you move from left to right across a period?

c) Why does the atomic radius increase/decrease as you move from top to bottom down a group?

2. Tape the graph of Electronegativity vs. Atomic number into your lab notebook. Label the peaks and

valleys with the symbol or name of the element.

Under the graph answer the following questions in complete sentences.

a) Summarize trends for electronegativity across a period (left to right) and down a group (top to

bottom).

b) Why does the electronegativity increase/decrease as you move from left to right across a period?

c) d. Why does the electronegativity increase/decrease as you move from top to bottom down a

group?

3. Tape the graph of 1

Ionization Energy vs. Atomic number into your lab notebook. Label the peaks and

valleys with the symbol or name of the element.

Under the graph answer the following questions in complete sentences.

a) Summarize trends for 1

Ionization Energy across a period (left to right) and down a group

(top to bottom).

b) Why does the 1

Ionization Energy increase/decrease as you move from left to right across a

period?

c) Why does the 1

Ionization Energy increase/decrease as you move from top to bottom down a

group?

Periodic Trends Lab Page 3