What are the three subatomic particles that make atoms?
Protons, Neutrons and Electrons
What are the two types of ion?
An acid reacts with a metal to form salt and hydrogen gas. What are the reactants of this equation?
Acid and metal.
Matter cannot be created or destroyed, only rearranged.
Is the pH of an acid below 7 or above 7?
Below
What is the electron shell configuration of Aluminium (Atomic Number: 13)?
2, 8, 3
A phosporus atom has 5 valence (outer shell) electrons. What charge will a phosporus ion have?
An acid reacts with a base to form a salt and water. What are the products of this reaction?
A salt and water.
The number of atoms for reactants and products in a chemical equation must be...
The same.
What substance has a pH of 7?
Water
When steel wool (Fe) is burnt, it reacts with oxygen (O) in the air. Will the wool weigh more or less after burning?
More, because the oxygen combines with the iron atoms.
Fe + O -> FeO
If a sodium ion (Na+) and a Chlorine ion (Cl-) bond to become table salt, what will the formula be?
NaCl
Sometimes a chemical reaction produces a lot of heat. This type of reaction is called an...
Exothermic reaction.
Balance: Mg + O2 -> MgO
2Mg + O2 -> 2MgO
When citric acid is added to bicarb soda, the beaker becomes very cold. This is called...
An endothermic reaction
How are atoms ordered on the Periodic Table?
By atomic number (number of protons)
If an Aluminium ion (Al3+) and a Sulfur ion (S2-) bond to become Aluminium sulfide, what will the formula be?
Al2Cl3
When wood is burned, heat and light are both produced. This is called a...
Combustion reaction
Is this equation balanced?
2AgNO3 + Fe -> Fe(NO3) + 2Ag
Yes
When an acid reacts with a metal, they create what?
A salt and hydrogen gas
What is the most common element on earth?
Oxygen (about 47% of earth's atoms are oxygen)
If a magnesium ion (Mg2+) and a carbonate ion (CO32-) bond to become calcium carbonate, what will the formula be?
MgCO3
What do groups tell us on the Periodic Table?
The number of valence electrons (electrons on the outermost shell) for elements in that group
Balance:
HCl + CaCO3 -> CaCl2 + H2O + CO2
2HCl + CaCO3 -> CaCl2 + H2O + CO2
When an acid reacts with a base, they create what?
A salt and water