ATDH CHEMISTRY EXAM LATEST UPDATED
2024-2025
Atom - ANSWER Smallest unit of an element
Molecule - ANSWER Atom bonded to at least one other atom
Ion - ANSWER Atom that has lost or gained an electron
Compound - ANSWER 2+ different elements
Diatomic elements - ANSWER H2, N2, O2, F2, Cl2, Br2, I2
Allotropes - ANSWER Elemental molecules with different formulas
Ionic compounds - ANSWER Metal and nonmetal (can be polyatomic too)
Molecular compounds - ANSWER Two or more nonmetals
Naming ionic compounds - ANSWER 1. Name the metal
2. write the metal's oxidation state as a Roman numeral in parenthesis (skip for
columns one and two)
3. Name the nonmetal using an "ide" ending
MgF2 - ANSWER magnesium fluoride
FeCl3 - ANSWER Iron (III) chloride
SnF2 - ANSWER Tin (II) fluoride
SnF4 - ANSWER Tin (IV) fluoride
Fe(NO3)2 - ANSWER Iron (II) Nitrate
NH4Cl - ANSWER Ammonium chloride
Al2O3 - ANSWER Aluminum oxide
FeCl2 - ANSWER Iron (II) chloride
,Ammonium chloride - ANSWER NH4Cl
Iron (III) cyanide - ANSWER Fe(CN)3
Magnesium sulfate - ANSWER MgSO4
Ammonium sulfate - ANSWER (NH4)2SO4
FeCO3 - ANSWER Iron (II) carbonate
Fe(CN)3 - ANSWER iron (III) cyanide
Al(OH)3 - ANSWER Aluminum hydroxide
CsNO3 - ANSWER Cesium nitrate
Zn3(PO4)2 - ANSWER Zinc phosphate
(NH4)2SO4 - ANSWER Ammonium sulfate
Naming molecular compounds - ANSWER 1. Give the appropriate numerical
prefix to the first element
2. Name the first element using its regular name on the periodic table
3. Give the appropriate numerical prefix to the second element
4. Name the nonmetal using an "ide" ending
Ex. dinitrogen monoxide, N2O
Naming binary acids - ANSWER 1. Hydro-
2. Insert the name of element 2, replacing "-ine" with "-ic acid)
ex. hydrochloric acid, HCl
Naming oxyacids - ANSWER 1. HClO - hypochlorous acid
2. HClO2 - chlorous acid
3. HClO3 - chloric acid
4. HClO4 - perchloric acid
Tetraphosphorus oxysulfide - ANSWER P4S6
, PCl3 - ANSWER Phosphorus trichloride
Dinitrogen tetroxide - ANSWER N2O4
Cl2O3 - ANSWER Dichloride trioxide
SF6 - ANSWER Sulfur hexafluoride
HCN - ANSWER hydrogen cyanide
H2SO3 - ANSWER Sulfurous acid
HClO4 - ANSWER Perchloric acid
H2SO4 - ANSWER sulfuric acid
Hydroiodic acid - ANSWER HI
HClO3 - ANSWER Chloric acid
H2SO5 - ANSWER Persulfuric acid
H3PO4 - ANSWER Phosphoric acid
HNO3 - ANSWER Nitric acid
H2CO3 - ANSWER Carbonic acid
H3PO3 - ANSWER Phosphorous acid
HNO2 - ANSWER Nitrous acid
Hydrobromic acid - ANSWER HBr
How many seconds are in a day? - ANSWER 86,400
How many hours are in a year? - ANSWER 8,760
How many kg are there in 7x10^25 mg? - ANSWER 7x10^16
How many seconds are there in 5.2x10^18 ns? - ANSWER 5.2x10^9
Please convert 20 km to cm. - ANSWER 2.0x10^6
If you're going 50mph, how many feet/second are you travelling? - ANSWER 73.3
ft/s
2024-2025
Atom - ANSWER Smallest unit of an element
Molecule - ANSWER Atom bonded to at least one other atom
Ion - ANSWER Atom that has lost or gained an electron
Compound - ANSWER 2+ different elements
Diatomic elements - ANSWER H2, N2, O2, F2, Cl2, Br2, I2
Allotropes - ANSWER Elemental molecules with different formulas
Ionic compounds - ANSWER Metal and nonmetal (can be polyatomic too)
Molecular compounds - ANSWER Two or more nonmetals
Naming ionic compounds - ANSWER 1. Name the metal
2. write the metal's oxidation state as a Roman numeral in parenthesis (skip for
columns one and two)
3. Name the nonmetal using an "ide" ending
MgF2 - ANSWER magnesium fluoride
FeCl3 - ANSWER Iron (III) chloride
SnF2 - ANSWER Tin (II) fluoride
SnF4 - ANSWER Tin (IV) fluoride
Fe(NO3)2 - ANSWER Iron (II) Nitrate
NH4Cl - ANSWER Ammonium chloride
Al2O3 - ANSWER Aluminum oxide
FeCl2 - ANSWER Iron (II) chloride
,Ammonium chloride - ANSWER NH4Cl
Iron (III) cyanide - ANSWER Fe(CN)3
Magnesium sulfate - ANSWER MgSO4
Ammonium sulfate - ANSWER (NH4)2SO4
FeCO3 - ANSWER Iron (II) carbonate
Fe(CN)3 - ANSWER iron (III) cyanide
Al(OH)3 - ANSWER Aluminum hydroxide
CsNO3 - ANSWER Cesium nitrate
Zn3(PO4)2 - ANSWER Zinc phosphate
(NH4)2SO4 - ANSWER Ammonium sulfate
Naming molecular compounds - ANSWER 1. Give the appropriate numerical
prefix to the first element
2. Name the first element using its regular name on the periodic table
3. Give the appropriate numerical prefix to the second element
4. Name the nonmetal using an "ide" ending
Ex. dinitrogen monoxide, N2O
Naming binary acids - ANSWER 1. Hydro-
2. Insert the name of element 2, replacing "-ine" with "-ic acid)
ex. hydrochloric acid, HCl
Naming oxyacids - ANSWER 1. HClO - hypochlorous acid
2. HClO2 - chlorous acid
3. HClO3 - chloric acid
4. HClO4 - perchloric acid
Tetraphosphorus oxysulfide - ANSWER P4S6
, PCl3 - ANSWER Phosphorus trichloride
Dinitrogen tetroxide - ANSWER N2O4
Cl2O3 - ANSWER Dichloride trioxide
SF6 - ANSWER Sulfur hexafluoride
HCN - ANSWER hydrogen cyanide
H2SO3 - ANSWER Sulfurous acid
HClO4 - ANSWER Perchloric acid
H2SO4 - ANSWER sulfuric acid
Hydroiodic acid - ANSWER HI
HClO3 - ANSWER Chloric acid
H2SO5 - ANSWER Persulfuric acid
H3PO4 - ANSWER Phosphoric acid
HNO3 - ANSWER Nitric acid
H2CO3 - ANSWER Carbonic acid
H3PO3 - ANSWER Phosphorous acid
HNO2 - ANSWER Nitrous acid
Hydrobromic acid - ANSWER HBr
How many seconds are in a day? - ANSWER 86,400
How many hours are in a year? - ANSWER 8,760
How many kg are there in 7x10^25 mg? - ANSWER 7x10^16
How many seconds are there in 5.2x10^18 ns? - ANSWER 5.2x10^9
Please convert 20 km to cm. - ANSWER 2.0x10^6
If you're going 50mph, how many feet/second are you travelling? - ANSWER 73.3
ft/s
