Polar Bonds 7.1.9

Presentation

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Science

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7th Grade

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Practice Problem

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Medium

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NGSS

MS-PS1-1, HS-PS1-1, HS-PS1-2

Standards-aligned

Laura O'Neill

Used 4+ times

FREE Resource

8 Slides • 11 Questions

Polar Bonds
Lesson 7.1.8

By Laura O'Neill

Notebook
Page 142

Water is a molecule with the chemical formula H₂O.
The hydrogen atoms share electrons with the oxygen atom to form a covalent bond.

There are TWO TYPES of Covalent bonds which we will discuss today!

Water

Valence electrons do not stay between the two atoms but spend time orbiting each atom.

See the hydrogen atoms sharing electrons!

The bonds that hold two atoms together share electrons EQUALLY.

Nonpolar

The bonds that hold two atoms together share electrons UNEQUALLY and the ends of the atoms become positively and negatively charged.

Polar

Two Types of Covalent Bonds

What do you notice about the water molecule to the right?

Because water is polar, it behaves in special ways:
- sticks to other molecules
- universal solvent
- sticks to itself

Water Molecule

Multiple Choice

What characteristic gives a water molecule its unique properties?

water contains nonpolar bonds

water is attractive to valence electrons

water contains extra electrons

water is a polar molecule

Categorize

Options (4)

Equal amount of time sharing electrons

Unequal amount of time sharing electrons

positive and negative charges on atoms form

atoms remain neutral

Match the characteristic to the type of covalent bond.

Nonpolar Covalent Bond

Polar Covalent Bond

Multiple Choice

How many electrons does one atom of Arsenic have?

Multiple Choice

How many neutrons does one atom of Arsenic have?

Multiple Choice

What is Arsenic's atomic mass?

Multiple Choice

How many valence electrons does one atom of Arsenic have?

Draw

Draw a Lewis dot structure for Arsenic.

Remember Arsenic has 5 valence electrons.

Draw

Draw a Lewis dot structure for arsenic and hydrogen creating a covalent bond.

Arsenic has 5 valence electrons and Hydrogen has 1 valence electron.

Multiple Choice

How many atoms of Chlorine are in Cl₂O₇?

Multiple Choice

How many atoms of Oxygen are in Hg(OH)₂?

Draw

CHALLENGE

How many atoms of each element are in the chemical formula Fe(C₂H₃O₂)₃?

See you Tomorrow!

Be sure to look for your study guide!

Polar Bonds
Lesson 7.1.8

By Laura O'Neill

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