A change with in appearance, but the chemical properties stay the same.
100
What is an energy level?
A space around the nucleus of an atom in which an electron moves.
100
What is a chemical formula?
Tells the kind of atoms and amount of each atom in a compound.
100
What is a binary compound?
A compound that contains two elements.
100
What is an acid? What is a base?
Acid - reacts with metals and produces hydrogen.
Base - contains the OH radical.
200
When atoms of elements combine to form a compound, what takes place?
A chemical change
200
Name the four energy levels and the amount each can hold.
K (2), L (8), M (18), N (32)
200
What is a subscript?
A number in the formula that tells the number of atoms of an element in a compound.
200
What is the ending of a binary compound?
-ide
200
What are the properties of an acid?
Tastes sour
Contains Hydrogen
React with metals
300
Give two examples of chemical changes.
Wood burning, baking a cake
300
How are energy levels filled?
They fill the energy levels in order closest to the nucleus.
300
What is a radical?
A group of two or more atoms that acts as one atom.
300
What is the name of this compound?
CaBr
Calcium Bromide
300
What are the properties of a base?
Tastes bitter
Contain the OH radical
Feel slippery
400
What is one characteristic of a compound?
Any particular compound always contains the same elements.
400
What is an ion?
An atom that has a positive or a negative charge.
400
How many atoms are there of C12 H22 O11
45 atoms
400
What is the name of this compound?
MgS
Magnesium Sulfide
400
What is an indicator?
A substance that changes color when added to an acid or a base.
500
Give three examples of a compound.
Water, Glucose, Nitrate
500
How do atoms of different elements combine?
An atom with a single electron in the most outer level may give it up. Also, an atom with one electron needed to fill the energy level may borrow an electron from another atom.
500
Write a chemical formula for a compound that contains one Aluminum and three atoms of chlorine