Inquiry: Trends in the Periodic Table (Basics)

Inquiry: Trends in the Periodic Table (Basics)

By Patricia Drake

Multiple Choice

Look at the Bohr Models you drew across row 1 and then row 2

What happens to the # of electrons found on the outside energy level as you go from the left to the right?

• Increase by 1

• Decrease by 1

• Stays the same

Outside Electrons = Valence Shell Electrons.

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Write this in your notes!​

1. ​These are HIGH ENERGY ELECTRONS

2. These are the only electrons INVOLVED IN BONDING​

Multiple Choice

Look at the Bohr Models you drew in column 1 and 2

What happens to the # of VALENCE SHELL electrons an atom has as you move down a column?

• Increases by 1

• Decreases by 1

• Stays the same

RECALL:

Copy the Valence Electron Trend across your tables

​Atoms are grouped into FAMILIES/COLUMNS due to similarities!!

​Make a note!

Helium = He only has 2 valence electrons​

All atoms want to be STABLE = have a complete outer energy level that contains 8 electrons (except for Hydrogen and Helium who only need 2 valence electrons since they only have 1 energy level!)

Two ways atoms can become stable = obtain a full outer energy level that contains 8 electrons:

Lose electrons..and thus lose an outside energy level or

Gain electrons

To decide on what they atom will do, think about what will take less energy​

Multiple Choice

Look at Li's Bohr Model and Dot Diagram.

What will Li do to become stable?

• Gain 7 more electrons so it has 8 valence like Ne

• Lose 1 valence electron so its inside shell with 2 valence electrons is exposed like He

Multiple Choice

Look at Na's Bohr Model and Dot Diagram.

What will Na do to become stable?

• Gain 7 more electrons so it has 8 valence like Ar

• Lose 1 valence electron so its inside shell with 8 valence electrons is exposed like N

Multiple Choice

Look at Be's Bohr Model and Dot Diagram.

What will Be do to become stable?

• Gain 6 more electrons so it has 8 valence like Ne

• Lose 2 valence electrons so its inside shell with 2 valence electrons is exposed like He

Multiple Choice

Look at Mg's Bohr Model and Dot Diagram.

What will Mg do to become stable?

• Gain 6 more electrons so it has 8 valence like Ar

• Lose 2 valence electrons so its inside shell with 8 valence electrons is exposed like Ne

Multiple Choice

Look at B's Bohr Model and Dot Diagram.

What will B do to become stable?

• Gain 5 more electrons so it has 8 valence like Ne

• Lose 3 valence electrons so its inside shell with 2 valence electrons is exposed like He

Multiple Choice

Look at Al's Bohr Model and Dot Diagram.

What will B do to become stable?

• Gain 5 more electrons so it has 8 valence like Ar

• Lose 3 valence electrons so its inside shell with 8 valence electrons is exposed like Ne

Multiple Choice

When atoms LOSE ELECTRONS, what charge will they become?

• Postive

• Negative

Multiple Choice

Look at C's Bohr model and lewis dot. What will C do to become stable?

• Gain 4 electrons to have 8 total valence electrons like Ne

• Lose 4 electrons so its inside shell is exposed with 2 valence electrons like He

• Gain or Lose 4 electrons b/c either way it can look like a noble gas

Multiple Choice

Look at N's Bohr Model and Lewis Dot diagram. What will N do to become stable?

• Gain 3 electrons so it has 8 total valence electrons like Ne

• Lose 5 electrons so its inside shell is exposed with 2 valence electrons like He

Multiple Choice

Look at P's Bohr Model and Lewis Dot diagram. What will P do to become stable?

• Gain 3 electrons so it has 8 total valence electrons like Ar

• Lose 5 electrons so its inside shell is exposed with 8 valence electrons like Ne

Multiple Choice

Look at O's Bohr Model and Lewis Dot diagram. What will O do to become stable?

• Gain 2 electrons so it has 8 total valence electrons like Ne

• Lose 6 electrons so its inside shell is exposed with 2 valence electrons like He

Multiple Choice

Look at S's Bohr Model and Lewis Dot diagram. What will S do to become stable?

• Gain 2 electrons so it has 8 total valence electrons like Ar

• Lose 6 electrons so its inside shell is exposed with 8 valence electrons like Ne

Multiple Choice

Look at F's Bohr Model and Lewis Dot diagram. What will F do to become stable?

• Gain 1 electrons so it has 8 total valence electrons like Ne

• Lose 7 electrons so its inside shell is exposed with 2 valence electrons like He

Multiple Choice

Look at Cl's Bohr Model and Lewis Dot diagram. What will Cl do to become stable?

• Gain 1 electrons so it has 8 total valence electrons like Ar

• Lose 7 electrons so its inside shell is exposed with 8 valence electrons like Ne

Multiple Choice

What charge do atoms become when the GAIN electrons?

• Postive

• Negative

Charges = Oxidation #s

Fill in oxidation #s across your periodic table

​Also, make sure you make a note on what the atom is doing - gaining or losing electrons