Lesson 3.1
What is a covalent bond?
A bond formed by the sharing of valence electrons.
What type of element is sodium?
metal
What is a chemical reaction?
A process in which atoms of one or more substances rearrange to form new substances.
What is a subscript?
A small number underneath the element that shows how many are there of that atom.
What is an ion? Give an example.
An atom that is no longer electrically neutral because it has lost or gained valence electrons.
Ex: Chlorine, Sodium, Neon, Argon.
True or False: Bonds break and bonds form.
True
What is the chemical formula for sugar?
C12H22O11
Name three types of bonding.
Ionic, metallic, and covalent.
What are the two substances in a chemical equation?
Reactants and products.
What is a polar molecule?
A molecule that has a partial positive and partial negative end due to unequal sharing.
Give an example for each type of bond.
Aluminium, salt, and water.
What is a coefficient?
A number placed in front of an element symbol.
Is a hydrogen molecule polar or nonpolar?
It is nonpolar.
Describe the properties of a metallic bond.
(at least 3)
-usually sold
-high melting and boiling points
-shiny
-malleable
-good conductors
What is the chemical formula for baking soda?
NaHCO3