Bonding lesson 1: valence electrons

Presentation

•

Science

•

7th Grade

•

Medium

•

NGSS

MS-ESS1-1, MS-ESS2-5, MS-PS1-1

+11

Standards-aligned

STEPHANIE SLUSS

Used 6+ times

FREE Resource

11 Slides • 14 Questions

Mission

❏Define and explain the importance of valence electrons
❏ Learn how groups have similiar properties

How do atoms
bond together ?

Elements in Group 1 all have 1 valence electron, so they will have similiar properties.

Valence Electrons

are electrons that in the outermost energy level. They are important because they determine how atoms will act

Now go back to pg 36- we will add valence to your chart

Now, we will add valence to your colored table (pg 36)

Group 1 Alkali metals have 1 valence electron. Place a 1 on top of this column on your periodic table

Now, we will add valence to your colored table (pg 36)

Group 2 Alkaline Earth metals have 2 valence electron. Place a 2 on top of this column on your periodic table

Transition metals are group 3-12 . These have a wide variety of valence numbers and this cannot be known by just looking at the table

Now add valence for Groups 13-18. Use the chart below to help you....

Now, carefully check your work

Pg 36 Should look like this... check your #'s

Now check your notes carefully

Multiple Choice

What are electrons in the outermost level of atoms called?

valence electrons

alkali metals

alkaline earth metals

creepy electrons

Multiple Choice

How many valence electrons are found in atoms of group 14?

Multiple Choice

How many valence electrons are found in atoms of group 1?

Multiple Choice

What are valence electrons?

The total number of electrons in an atom

The number of electrons in the outermost shell

The number of electrons in the second shell

The number of protons in the outermost shell

Multiple Choice

Which elements have the most similar chemical properties?

boron and carbon

oxygen and sulfur

aluminum and bromine

argon and silicon

Multiple Choice

Valence electrons are:

Electrons farthest away from the nucleus

Electrons closest to the nucleus

Electrons that just come and go - they don't stay with the atom

Electrons in the second shell

Multiple Choice

When trying to identify an unknown element, a scientist determines what other elements reacts with chemically. Which property of the unknown element determines the other element it reacts with?

The total number of neutrons in the unknown element

The total number of particles in the nucleus of the unknown element

The number of protons in the nucleus of the unknown element

The number of valence electrons in the unknown element

Multiple Choice

What groups are the most reactive metals?

2 and 3

1 and 18

1 and 2

16 and 17

Multiple Choice

How many valence electrons does carbon have?

Multiple Choice

Valence electrons are the...

Innermost electrons

Middle electrons

Outermost electrons

Any electrons

Mission

❏Define and explain the importance of valence electrons
❏ Learn how groups have similiar properties

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