Ions
Valence Electrons
Ionic Bonds
Covalent Bonds
Grab Bag
100
What does an atom have to do to become a positive ion?
Lose an electron
100

What do the dots in a Lewis (or electron) Dot structure represent?

Valence electrons

100
Ionic bonds form between a _____ ion and a ______ ion.
A positive and negative ion
100
When does a covalent bond form?
A covalent bond forms when atoms share electrons.
100
How do the electrons move in metallic bonds?
The electrons move around freely.
200
What does an atom have to do to become a negatively charged ion?
gain electrons
200
How many valence electrons are in group 16?
6
200
Ionic bonds form between what classes of elements?
Metals and nonmetals
200

What kind of elements does a covalent bond form between?

A covalent bond forms between nonmetals.

200
Metallic bonds are formed by the attraction between ________ and the _________ that are around them.
Metallic bonds are formed by the attraction between POSITIVE METAL IONS and the ELECTRONS that are around then.
300

What is an ion?

A charged atom

300

How many dots would go around the Lewis Dot Structure for Helium?

2

300

The formula for X2+ and Y3-.

X3Y2

300

How many electrons are shared in a single covalent bond?

What is 2 electrons?

300

What is the octet rule?

Atoms want to have 8 electrons in their valence shell.

400

Would two positive ions make bonds? Explain?

No, because alike charges are not attracted to each other.

400
How many valence electrons does aluminum have?
3
400

The formula for XY4+1 and Z3-

(XY4)3Z

400

What is a polar covalent bond?

A bond where one side is slightly positive, and one side is slightly negative.

400

How many different types of atoms are in Na2(SO4)

3

500
What is a Cation?
a positively charged ions
500

Why won't elements in group 18 make bonds?

Because their outer shell is full

500

What are 3 qualities of substances that are bonded by ionic bonds?

They are hard, brittle, conduct electricity and have high melting points.

500

What is the formula for TriNitrogen Dioxide

N3O2

500

The number of atoms of hydrogen in hydrogen gas.

2

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