CHEM 101 CERTIFICATION EXAM
QUESTIONS AND VERIFIED
ANSWERS 2026
▶ STUDY LIST. Answer: 1) memorize flashcards and quizlet
2) label periodic table sections
3) balancing equations
4) draw lewis structures
5) difference b/w ionic and covalent formulas
6) line angle structures
7) functional groups
8) drawing isomers
9) memorize common bonding patterns
10) how to tell if something is polar or non-polar
11) practice pH problems
12) practice molar/molar mass/etc problems
13) quizlet on PL powerpoint
14) memorize strong acids and bases
▶ which of the following are chemical changes?
a) water is boiled
b) water is heated up
c) gas is evaporated
d) water is frozen
e) gas is burned. Answer: e) gas is burned
▶ which of the following are chemical changes?
a) a cheese sandwich is toasted
b) milk turns sour in the fridge
c) the nail heads in your desk rust
d) baking soda, flour and salt are mixed to make baking mix
, e) rock candy crystals precipitate from a concentrated sugar solution.
Answer: a) a cheese sandwich is toasted
b) milk turns sour in the fridge
c) the nail heads in your desk rust
▶ which of the following are chemical changes?
a) warm soda fizzes when opened
b) copper roof turns green over time
c) fog appears on windshield in cold weather
d) sugar dissolved in water
e) baking soda dissolved in vinegar and bubbles form. Answer: b) copper
roof turns green over time
e) baking soda dissolved in vinegar and bubbles form
▶ which of the following are chemical changes?
a) silver teapot turns black
b) candle wax is melted
c) candle is burned
d) two clear colorless salt sols are mixed and a bright orange precipitate
forms
e) sugar crystals ground to a fine powder. Answer: a) silver teapot turns
black
c) candle is burned
d) two clear colorless salt sols are mixed and a bright orange precipitate
forms
▶ what is the chemical formula for water. Answer: H2O
▶ periodic law. Answer: properties repeat within groups
elements arranged by atomic number
▶ atoms. Answer: Smallest particle of an element that still retains all
properties of that element
have 3 parts: protons, neutrons, electrons
▶ charge of proton. Answer: +1 charge, mass= 1 amu
▶ charge of neutron. Answer: no charge, mass= 1 amu
▶ charge of electron. Answer: -1 charge, mass= 0 amu
QUESTIONS AND VERIFIED
ANSWERS 2026
▶ STUDY LIST. Answer: 1) memorize flashcards and quizlet
2) label periodic table sections
3) balancing equations
4) draw lewis structures
5) difference b/w ionic and covalent formulas
6) line angle structures
7) functional groups
8) drawing isomers
9) memorize common bonding patterns
10) how to tell if something is polar or non-polar
11) practice pH problems
12) practice molar/molar mass/etc problems
13) quizlet on PL powerpoint
14) memorize strong acids and bases
▶ which of the following are chemical changes?
a) water is boiled
b) water is heated up
c) gas is evaporated
d) water is frozen
e) gas is burned. Answer: e) gas is burned
▶ which of the following are chemical changes?
a) a cheese sandwich is toasted
b) milk turns sour in the fridge
c) the nail heads in your desk rust
d) baking soda, flour and salt are mixed to make baking mix
, e) rock candy crystals precipitate from a concentrated sugar solution.
Answer: a) a cheese sandwich is toasted
b) milk turns sour in the fridge
c) the nail heads in your desk rust
▶ which of the following are chemical changes?
a) warm soda fizzes when opened
b) copper roof turns green over time
c) fog appears on windshield in cold weather
d) sugar dissolved in water
e) baking soda dissolved in vinegar and bubbles form. Answer: b) copper
roof turns green over time
e) baking soda dissolved in vinegar and bubbles form
▶ which of the following are chemical changes?
a) silver teapot turns black
b) candle wax is melted
c) candle is burned
d) two clear colorless salt sols are mixed and a bright orange precipitate
forms
e) sugar crystals ground to a fine powder. Answer: a) silver teapot turns
black
c) candle is burned
d) two clear colorless salt sols are mixed and a bright orange precipitate
forms
▶ what is the chemical formula for water. Answer: H2O
▶ periodic law. Answer: properties repeat within groups
elements arranged by atomic number
▶ atoms. Answer: Smallest particle of an element that still retains all
properties of that element
have 3 parts: protons, neutrons, electrons
▶ charge of proton. Answer: +1 charge, mass= 1 amu
▶ charge of neutron. Answer: no charge, mass= 1 amu
▶ charge of electron. Answer: -1 charge, mass= 0 amu
