Ions
Valence Electrons
Ionic Bonds
Covalent Bonds
Metals/Nonmetals
100
What does an atom have to do to become a positive ion?
Lose an electron
100
What determines if the atom will bond with another?
valence electron
100

Ionic bonds form between a _____ charged ion and a charged ______ ion.

A positive and negative ion

100
When does a covalent bond form?
A covalent bond forms when atoms share electrons.
100

What type of charge do metal ions have?

positive

200
What does an atom have to do to become a negatively charged ion?
gain electrons
200

How many valence electrons are in group 2?

2

200
Ionic bonds form between what classes of elements?
Metals and nonmetals
200
What class of elements does a covalent bond form between?
A covalent bond forms between nonmetals.
200

Anions are formed by what type of element?

Nonmetals

300
what is an ion
a charged atom
300
based on the number of valence electrons would elements in group 18 make bonds?
no
300
When atoms are bonded by ionic bonds, a _______ forms.
A crystal lattice
300

Water is made when oxygen is bonded to another element with covalent bonds. What is the other element and how many atoms of that element is needed?

The other element is hydrogen, and two hydrogen atoms are needed.

300

What is the formula for magnesium chloride?

MgCl2

400
Would two positive ions make bonds?Why?
No, because alike charges are not attracted to each other.
400
How many valence electrons does aluminum have?
3
400

A nonmetal atom gains electrons when it is bonded to another with an ionic bond, so the atom becomes more ________.

Negative

400

What is formed when a group of atoms is bonded together by covalent bonds?

A molecule is formed.

400

What is the name of Na2S?

sodium sulfide

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 qualities of substances that are bonded by ionic bonds?
They are hard, brittle, and have high melting points.
500
What are the qualities of a substance that is bonded by covalent bonds?
The qualities are low melting and boiling point, also they tend to be brittle when in a solid state.
500

What is the formula for aluminum sulfate?

Al2(SO4)3

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