Atoms
How many Atoms are in the molecule CO?
2
How many Molecules are present in the following chemical formula? 1CH4
1
Which group on the periodic table has the highest reactivity?
Group 1
Ca + O2 ----> CaO
2Ca + O2 -----> 2CaO
Top left hand corner
How many atoms are in the Molecule H2O2?
4
How many molecules are there in the following formula? 5H2O
5
Which group will group 6 react with the easiest?
group 2
H2 + Cl2 -----> HCl
H2 + Cl2 -----> 2HCl
By the group number, if it's a 2 digit number you look at the last digit
How many atoms are in the molecule (CH4)3
15
How many molecules of Fe are produced in the following chemical reaction?
2Fe2O3 + 3C ---> 4Fe + 3CO2
4
Which group will group 1 react with the easiest?
7
P4 + S8 ----> P2S4
P4 + S8 ----> 2P2S4
How can you tell if chemical reaction has occurred?
The properties are no longer the same as what you started with.
How many atoms are in the molecule C6H8O7
21
How many molecules of CH4 react with O2 in the following chemical reaction?
CH4 + 2O2 ----> C02 + 2H2O
1
What is the magic number in chemistry that each bond wants to have as far as the number of electrons to be the most stable?
8
Fe + H2O ----> Fe2O3 + H2
2Fe + 3H2O ----> Fe2O3 + 3H2
What does conservation of mass mean and give one example of an expirement in our class that mass was conserved.
Bath bombs in a bottle and it's the simple fact that mass cannot be created or destroyed. The number of atoms of your reactants has to equal your products.
How many atoms are in the molecule (NaHCO3)2
12
How many molecules of NH3 are produced in the following chemical reaction?
N2 + H2 ----> 2NH3
2
Which group has the lowest reactivity?
Group 18
MgCl2 + Al(OH)3 -----> AlCl3 + Mg(OH)2
3MgCl2 + 2Al(OH)3 -----> 2AlCl3 + 3Mg(OH)2
How can we make something new (gas) that was not there before?
Thru a chemical change when the initial molecules break apart and the atoms that composed of the original molecules separate and rearrange themselves.