Six minute(s) for Do NowFive

32. What does the Periodic Table reveal about the Bohr Model?

HW or study questions? @MrLinehan

11/12

DN 32 DN30 CW 30 DN 31 CW 31

A Day

For a great stamp: complete, silent, and seated in assigned chair.

FourThreeTwoOneTime is now up for the Do Now!

Remember to set up your notebook when done.

Six minute(s) for Do NowFive

32. What does the Periodic Table reveal about the Bohr Model?

HW or study questions? @MrLinehan

11/12

DN 31 DN 32DN30 CW 32 CW 30 DN 31 CW 31

B Day

For a great stamp: complete, silent, and seated in assigned chair.

FourThreeTwoOneTime is now up for the Do Now!

Remember to set up your notebook when done.

Agenda

• Do now review• Mastery competition update• Bohr model review: coach-scribe• Cornell notes: the Periodic Table• Practice worksheet• Exit check

The Do Now.Let’s review.

By the end of class…

• Produce an image of the Bohr Model of an atom

• Use the Bohr Model and the Periodic Table to explain how atoms share electrons

• Key vocab:– Period– Group– Valence level– Ion– Cation– Anion

What is the Bohr model?

Energy levelsThe orbits of the electronsUp to 2 electrons in 1st

Up to 8 electrons in next

ProtonsIn nucleus Charge of +1 each

NeutronsIn nucleus No charge

NucleusIn middleNet positive charge

ElectronsOrbit nucleusCharge of -1 each

Previously covered:D31, D22

Coach-scribe: Draw the Bohr Model

• In partners (or threes, if three at table)

• Scribe (partner with lowest seat #) will draw the Bohr model

• Coach will provide instructions

• If there’s a disagreement, the scribe should begin a discussion

• Mr. Linehan will only help if the group can’t agree

Will be collected & graded for 5 points:• Atomic structure accurate• Includes all five labels

from previous slide• Each part drawn with

different color• Entire picture is drawn

neatly• All names written on back

The Periodic Table

GroupsVertical columns

PeriodsHorizontal rows

Both are numbered!

The P.T. and the Valence LevelValence levelThe farthest out energy level in an atom

All atoms want to have a full valence level!

(Normally 8 electrons.)

The P.T. and the Valence LevelThe Periodic Table tells you how many valence electrons you start with.

1

2 3 4 5 6 78 (except He)

1

213 14 15 16 17

18Group #:

Red = number of valence electrons in that group.

The P.T. and sharing electrons

7 valence electrons 1 valence electron

Atoms share electrons to make ions. Ions are atoms that have traded electrons.

The P.T. and sharing electrons

AnionGains electronsMore electrons than protons negative charge

CationLoses electronsMore protons than electrons positive charge

-1

The P.T. and sharing electrons

If it starts with three or fewer valence electrons, it will lose

them all.

If it starts with four, it can gain four or loose four.

If it starts with five or more, it will gain to get to 8.

Independent practice.In seven minutes, complete at least five rows on

the back of the Do Now individually.

If you have questions, first ask a member of your element group. Only ask Mr. Linehan if neither of you knows.

Exit check

• Work independently

• On a separate piece of paper

• Write period # at top

• Close notebooks• Counts toward

mastery competition

1. Will an element that gains electrons have positive or negative charge?

2. Will the element Magnesium (group 2) want to gain or lose electrons?

3. True/false: a sulfur atom with a full valence shell is a cation.