# Periodic Trends Intro (CP)

```Periodic Trends Introduction
Name_________________________________________________Date__________Block_____
Part 1
1. Pick one group from group 1A through 8A: ______
2. Pick three elements from the group you picked in #1: ____________________________
Element #1
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Number of electrons in highest
occupied energy level
Element #2
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Number of electrons in highest
occupied energy level
1
Periodic Trends Introduction
Element #3
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Number of electrons in highest
occupied energy level
Questions
1. Describe one similarity and one difference in the electron configurations of these elements.
______________________________________________________________________________
______________________________________________________________________________
2. Describe one similarity and one difference in the Bohr models of these elements.
______________________________________________________________________________
______________________________________________________________________________
3. What happens to the number of protons in the elements as you move down the group?
______________________________________________________________________________
______________________________________________________________________________
4. What happens to the number of occupied energy levels as you move down the group?
______________________________________________________________________________
______________________________________________________________________________
5. What is the trend in the number of electrons in the highest energy level?
______________________________________________________________________________
______________________________________________________________________________
2
Periodic Trends Introduction
Part 2
1. Pick one period from period 1 through period 3: ______
2. Pick three elements from the period you picked in #1: ____________________________
Element #1
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Number of electrons in highest
occupied energy level
Element #2
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Number of electrons in highest
occupied energy level
3
Periodic Trends Introduction
Element #3
Electron configuration
Bohr model
Number of protons in nucleus
Number of occupied energy levels
Questions
1. Describe one similarity and one difference in the electron configurations of these elements.
______________________________________________________________________________
______________________________________________________________________________
2. Describe one similarity and one difference in the Bohr models of these elements.
______________________________________________________________________________
______________________________________________________________________________
3. What happens to the number of protons in the elements as you move across the period?
______________________________________________________________________________
______________________________________________________________________________
4. What happens to the number of occupied energy levels as you move across the period?
______________________________________________________________________________
______________________________________________________________________________
5. What is the trend in the number of electrons in the highest energy level?
______________________________________________________________________________
______________________________________________________________________________
4
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