Chem 1010 Final exam prep
How many electrons are in the first ener-
2 electrons
gy level for atoms up to argon?
How many electrons are in the second
8 electrons
energy level for atoms up to argon?
How many electrons are in the third en-
8 electrons
ergy level for atoms up to argon?
What is the total number of electrons for 18 electrons (since argon's atomic num-
a neutral atom of argon? ber is 18)
Fill the first energy level with 2 electrons,
How do you fill up the electron levels for the second with 8 electrons, and the third
atoms up to argon? with 8 electrons until all electrons are
used up.
How do you determine the number of Count across the row on the Periodic
valence electrons for any nonmetal or Table until you get to the element, skip-
main group metal? ping over the transition metals.
How many valence electrons does hy-
1 valence electron
drogen have?
How many valence electrons does car-
4 valence electrons
bon have?
How many valence electrons does oxy-
6 valence electrons
gen have?
How many valence electrons does sodi-
1 valence electron
um have?
How many valence electrons does chlo-
7 valence electrons
rine have?
How many valence electrons does argon
8 valence electrons
have?
Which atoms do not form ionic or cova- Atoms with 8 valence electrons do not
lent compounds? form ionic or covalent compounds.
What element in the 4th period does not
Krypton (Kr)
form compounds?
Why do atoms with 8 valence electrons Because they have a full valence shell,
not form ionic or covalent compounds? they are stable and unreactive.
, Chem 1010 Final exam prep
Nonmetal atoms need as many hydro-
How many hydrogen atoms does a non-
gen atoms as they are lacking valence
metal need to form a compound?
electrons to complete their octet.
Sulfur needs 2 hydrogen atoms to form
How many hydrogen atoms would sulfur a stable compound (since sulfur has 6
need to form a stable compound? valence electrons and needs 2 more to
complete its octet).
Nitrogen needs 3 hydrogen atoms to
How many hydrogen atoms would nitro- form a stable compound (since nitrogen
gen need to form a stable compound? has 5 valence electrons and needs 3
more to complete its octet).
Oxygen needs 2 hydrogen atoms to form
How many hydrogen atoms would oxy- a stable compound (since oxygen has 6
gen need to form a stable compound? valence electrons and needs 2 more to
complete its octet).
Which formula requires a double bond,
CH3N requires a double bond.
CH5N or CH3N?
In CH3N, nitrogen needs three bonds to
complete its octet. After forming single
Why does CH3N require a double bond? bonds with three hydrogen atoms, nitro-
gen still needs one more bond, which
requires a double bond with carbon.
How many electrons are shared in a sin-
2 electrons
gle bond?
How many electrons are shared in a dou-
4 electrons
ble bond?
How many electrons are shared in a
6 electrons
triple bond?
How many electrons are shared by the 6 electrons (since N2 has a triple bond
two nitrogen atoms in N2? between the two nitrogen atoms)
How do you categorize compounds as Organic compounds contain carbon; in-
organic or inorganic? organic compounds do not
Is sodium acetate (NaCH3O2) organic or Sodium acetate (NaCH3O2) is organic
inorganic? because it contains carbon.
How many electrons are in the first ener-
2 electrons
gy level for atoms up to argon?
How many electrons are in the second
8 electrons
energy level for atoms up to argon?
How many electrons are in the third en-
8 electrons
ergy level for atoms up to argon?
What is the total number of electrons for 18 electrons (since argon's atomic num-
a neutral atom of argon? ber is 18)
Fill the first energy level with 2 electrons,
How do you fill up the electron levels for the second with 8 electrons, and the third
atoms up to argon? with 8 electrons until all electrons are
used up.
How do you determine the number of Count across the row on the Periodic
valence electrons for any nonmetal or Table until you get to the element, skip-
main group metal? ping over the transition metals.
How many valence electrons does hy-
1 valence electron
drogen have?
How many valence electrons does car-
4 valence electrons
bon have?
How many valence electrons does oxy-
6 valence electrons
gen have?
How many valence electrons does sodi-
1 valence electron
um have?
How many valence electrons does chlo-
7 valence electrons
rine have?
How many valence electrons does argon
8 valence electrons
have?
Which atoms do not form ionic or cova- Atoms with 8 valence electrons do not
lent compounds? form ionic or covalent compounds.
What element in the 4th period does not
Krypton (Kr)
form compounds?
Why do atoms with 8 valence electrons Because they have a full valence shell,
not form ionic or covalent compounds? they are stable and unreactive.
, Chem 1010 Final exam prep
Nonmetal atoms need as many hydro-
How many hydrogen atoms does a non-
gen atoms as they are lacking valence
metal need to form a compound?
electrons to complete their octet.
Sulfur needs 2 hydrogen atoms to form
How many hydrogen atoms would sulfur a stable compound (since sulfur has 6
need to form a stable compound? valence electrons and needs 2 more to
complete its octet).
Nitrogen needs 3 hydrogen atoms to
How many hydrogen atoms would nitro- form a stable compound (since nitrogen
gen need to form a stable compound? has 5 valence electrons and needs 3
more to complete its octet).
Oxygen needs 2 hydrogen atoms to form
How many hydrogen atoms would oxy- a stable compound (since oxygen has 6
gen need to form a stable compound? valence electrons and needs 2 more to
complete its octet).
Which formula requires a double bond,
CH3N requires a double bond.
CH5N or CH3N?
In CH3N, nitrogen needs three bonds to
complete its octet. After forming single
Why does CH3N require a double bond? bonds with three hydrogen atoms, nitro-
gen still needs one more bond, which
requires a double bond with carbon.
How many electrons are shared in a sin-
2 electrons
gle bond?
How many electrons are shared in a dou-
4 electrons
ble bond?
How many electrons are shared in a
6 electrons
triple bond?
How many electrons are shared by the 6 electrons (since N2 has a triple bond
two nitrogen atoms in N2? between the two nitrogen atoms)
How do you categorize compounds as Organic compounds contain carbon; in-
organic or inorganic? organic compounds do not
Is sodium acetate (NaCH3O2) organic or Sodium acetate (NaCH3O2) is organic
inorganic? because it contains carbon.
