Atoms and Bonding
Periodic Table
Describing Chemical Changes
Observing Chemical Changes
Misc...
100
What is the atomic number of this element?
19
100
The most reactive side of the periodic table can be found all the way to the....
left
100
In a chemical equation, the arrow is read as
yields, produces
100
Water boiling is an example of a
physical property or physical change
100
An atom's valence electrons are those electrons that have the highest/lowest energy.
highest.
200
What is the atomic symbol?
K
200
The most stable side of the periodic table is found all the way to the
right
200
When a reaction absorbs energy instead of releasing it, it is known as an __________ reaction.
Endothermic
200
Substances that are produced during a chemical reaction are known as
products
200
Ability to react with oxygen would be a
chemical property
300
The noble gasses have how many valance electrons?
8
300
The columns in the periodic table are called
Families
300
When a reaction produces heat, it is known as an _______ reaction
exothermic
300
Substances that enter a reaction are called
reactants
300
The attractive force that holds two atoms together is called a(n)
bond
400
Lithium, sodium, potassium, are all examples of what type of element?
Alkali metals
400
The rows in the periodic table are called
Periods
400
The number written in front of chemical equations is known as the
coefficient
400
Give an example of a physical change
Folding, crumpling, ripping, melting, boiling, etc...
400
How many valance electrons does Neon have?
8
500
The atomic number is the total number of _________ in the nucleus of an atom
Protons
500
A _____________ shows the number of valence electrons in an atom in pictorial fashion
Electron dot diagram
500
The principle that states that matter is neither created nor destroyed during a chemical reaction is called the
Law of Conservation of Matter
500
Give an example as to when you know a chemical change has occurred.
Color change, burning, etc...
500
When the equation Al + Br2 ----> AlBr3 is balanced, the coefficient for Al is
2