Electrons
What value on the periodic table determines an element's number of valence electrons?
What is the group number (the last digit in the group number)
Define the term oxidation state:
An oxidation state is the charge an element has when it has a full shell of valence electrons
What is the molecular mass of H2O
18.02 g
What do the charges of each atom need to be when they made a bond to create a chemical formula
The charge when it has a full valence shell of electrons so that the entire molecule's charges add up to 0
Which of the 4 categories of chemical reactions is
2NO + O2 → 2NO2
What is synthesis
How many valence electrons does an element need to get a full shell?
What is 8
What is the oxidation state of oxygen?
What is -2
What is the molecular mass of CO2?
44.01 g
What is the criss-cross rule?
The charge of one element is the amount of atoms you need of the other element
Which of the 4 categories of chemical reactions is 2KI +Pb(NO3)2 →2KNO3 +PbI2
What is double replacement
What is the charge of Ca when it has a full valence shell of electrons?
+2 charge
What is the oxidation state of potassium (K)?
What is +1
How do you find the molecular mass of a substance?
Use its chemical formula and add the masses on the periodic table of all the elements together
How do you write how many atoms there are of an element in a chemical formula?
You write is as a subscript (small number) after the element symbol
Which of the 4 categories of chemical reactions is 2AlPO4 +3Mg →2Al +Mg3(PO4)2
What is single replacement
What is the charge of Cl when it has a full valence shell of electrons?
-1 charge
What is the oxidation state of Aluminum (Al)?
What is +3
What is the molecular mass of Mg(NO3)2
148.31 g
What is the chemical formula of a substance made up of Sr and Br?
SrBr2
Which of the 4 categories of chemical reactions is CaCO3 → CaO + CO2
What is decomposition
What is the charge of P when it has a full valence shell of electrons?
What is -3
What is the oxidation state of phosphorus (P)?
What is -3
What is the molecular mass of H2SO4
98.08
What is the chemical formula of a substance made up of K and N?
K3N
What are the 5 categories of types of chemical reactions?
Synthesis, decomposition, single replacement, double replacement, combustion