Counting Atoms
How many atoms are in the molecule C2H6?
8. C=2, H=6
What is the formula for sodium chloride?
NaCl
What is the name of N2O?
Dinitrogen monoxide
What is the oxidation number of oxygen?
-2
What type of bond is formed when electrons are shared between atoms?
Covalent
In the chemical formula NaCl, how many different types of atoms are present?
2.
Na and Cl
Name the compound MgO.
Magnesium oxide
Write the formula for carbon dioxide.
CO2
In a molecule of water (H₂O), what is the oxidation number of hydrogen?
+1
Which type of bond occurs between a metal and a non-metal?
Ionic
What is the total number of atoms in the compound C3H4O2?
9.
C=3
H=4
O=2
Write the formula for calcium fluoride.
CaF2
Name the compound P2O5.
Diphosphorus pentoxide
How do you determine the oxidation number of an element in a compound?
following a set of rules including the charge of the ion and the usual oxidation states of the elements
In a covalent bond, what is formed when two atoms share a single pair of electrons?
single covalent bond
In the formula Fe2O3, how many iron atoms are there?
2.
What is the name of the compound K2S?
Potassium sulfide
What is the formula for sulfur trioxide?
SO3
What is the oxidation state of carbon in carbon dioxide (CO₂)?
+4
What is the primary difference between ionic and covalent bonds?
Ionic bonds involve the transfer of electrons, while covalent bonds involve the sharing of electrons
Calculate the total number of atoms in C6H12O6.
24 total
Write the formula for aluminum oxide.
Al2O3
Name the compound CCl4.
Carbon tetrachloride
If a compound has a total charge of -3 and contains three different elements, how do you find the oxidation number of one of those elements?
by knowing the oxidation numbers of the other elements and using the rule that the sum of all oxidation numbers must equal the total charge of the compound
Other than the sharing of electrons, how do we know that a covalent bond has formed?
Because it is between 2 or more non-metals.