Electrons
Ionic bonds
Covalent bonds
Metallic bonds
Mystery
100
What is a valence electron?
An electron found in the outermost shell.
100
How does an ionic bond form?
When valence electrons are transferred from one atom to another atom.
100
How does covalent bonds form?
They form when atoms share one or more pairs of electrons.
100
How does metallic bonds form?
Its formed by the attraction between positively charged metal ions and the electrons around the ions.
100
What is a chemical bond?
The force of attraction that holds the atoms together.
200
How many electrons can the innermost ring hold?
2
200
What classes of elements does ionic bonds work with?
Metals and nonmetals
200
What do covalent bonds make?
Molecules
200
What class of element does metallic bonds work with?
Metals
200
What does bonding depend on?
Valence electrons
300
How many electrons can the second and third rings hold?
8
300
fWhat classes of elements are positive ions and what are negative?
Metals are positive and nonmetals are negative.
300
What class of element does covalent bonds work with?
Nonmetals
300
Why can metal be reshaped without breaking?
Because metallic bonds occur in many directions.
300
What is an electron dot diagram?
A model that shows only the valence electrons in a model to help you predict how atoms bond.
400
How many valence electrons are in oxygen?
6
400
How does a positive ion form and how does a negative ion form?
A postive ion forms by loosing electrons. A negative ion forms by gaining electrons.
400
What are some properties of covalent bonds?
Low melting and boiling points, and brittle in solid states.
400
What are the properties of metallic bonds?
Electrical conductivity, malleability, ductility
400
What is a crystal lattice?
The regular pattern in which a crystal is arranged.
500
How do you figure out how many valence electrons an element has?
By looking at its group on the periodic table.
500
What are some properties of ionic bonds?
Hard and brittle with high melting points.
500
What are diomatic molecules?
Molecules made up of two atoms.
500
What is the difference between malleability and ductility?
Malleability is the ability to be rolled or pounded. Ductility is the ability to be drawn into wires.
500
How many valence electrons are in an element in group 17?
7