Show:
Valence Electrons
Ionic Bonds
Covalent Bonds
Metallic Bonds
Vocabulary
100
What are valence electrons?
The number of electrons in the outermost ring of an atom.
100
What kind of atoms form ionic bonds?
Positive and negative ions
100
When are covalent bonds formed?
When two atoms share electrons
100
In what class of elements are metallic bonds formed?
Metals
100
What is chemical bonding?
the joining of atoms to form new substances
200
How many valence electrons are in groups 3 to 12?
1 or 2 valence electrons
200
How do you form a positive ion?
Lose an electron
200
Electron-dot diagrams show what?
Number of valence electrons an atom has
200
What type of bond is similar to metallic bonds?
Covalent bonds because they both share electrons.
200
What is a chemical bond?
force of attraction that holds the atoms together
300
What can valence electrons determine?
Whether an atom will bond with another atom.
300
If you gain electrons, what charge will the ion have?
Negative
300
What types of chemical bonds are weak?
Covalent bonds
300
What is the movement of the atoms in metallic bonds?
They are free to move around the atom.
300
What is ductility?
the ability to be drawn into wires
400
If an atom has five valence electrons, how many valence electrons will the atom it bonds with have?
3
400
What class of elements form ionic bonds?
Metals (positive) and nonmetals (negative)
400
What are the characteristics of covalent bonds?
Brittle in solid state, and low melting and boiling points
400
How is a metallic bond formed?
A metallic bond is formed by the attraction between positive metal ions and the electrons in the metal.
400
What is malleability?
the ability to be rolled or pounded
500
How many valence electrons do halogens have?
7
500
What are the characteristics of ionic bonds?
They are hard, brittle, and have high melting and boiling points.
500
How do you form a molecule?
When a group of atoms are held together by covalent bonds
500
What properties do metallic bonds give metals?
Electrical conductivity, ductility, and malleability.
500
What is a crystal lattice?
the regular pattern in which a crystal is arranged