About this Study Set
This study set covers Chemistry through
25 practice questions.
A collection of fundamental chemistry facts covering elements, states of matter, and basic principles. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Chemistry Essentials study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
Which chemical element has the atomic number 1?
-
A
Helium
-
B
Hydrogen
-
C
Oxygen
-
D
Carbon
2
What is the chemical symbol for gold?
3
Which state of matter has a definite volume but no definite shape?
-
A
Solid
-
B
Gas
-
C
Liquid
-
D
Plasma
4
What is the most abundant gas in Earth's atmosphere?
-
A
Oxygen
-
B
Nitrogen
-
C
Carbon Dioxide
-
D
Hydrogen
5
Which subatomic particle carries a negative electrical charge?
-
A
Proton
-
B
Neutron
-
C
Electron
-
D
Nucleus
6
What is the chemical formula for water?
7
Which element is a diamond made of?
-
A
Carbon
-
B
Silicon
-
C
Iron
-
D
Gold
8
What is the pH level of pure water at 25 degrees Celsius?
9
Which metal is liquid at room temperature?
-
A
Lead
-
B
Mercury
-
C
Iron
-
D
Copper
10
What does the atomic number of an element represent?
-
A
Number of neutrons
-
B
Number of protons
-
C
Atomic mass
-
D
Number of electrons in the outer shell
11
Which gas do plants absorb from the atmosphere for photosynthesis?
-
A
Oxygen
-
B
Nitrogen
-
C
Carbon Dioxide
-
D
Helium
12
What is the common name for sodium chloride?
-
A
Baking soda
-
B
Table salt
-
C
Sugar
-
D
Vinegar
13
Which element is represented by the symbol 'O'?
-
A
Osmium
-
B
Oxygen
-
C
Gold
-
D
Neon
14
What type of bond involves the sharing of electron pairs between atoms?
-
A
Ionic
-
B
Covalent
-
C
Metallic
-
D
Hydrogen
15
Which substance is known as the 'universal solvent'?
-
A
Alcohol
-
B
Water
-
C
Oil
-
D
Vinegar
16
What is the center of an atom called?
-
A
Shell
-
B
Nucleus
-
C
Orbital
-
D
Ion
17
Which element is essential for human respiration and makes up about 21% of the atmosphere?
-
A
Hydrogen
-
B
Oxygen
-
C
Nitrogen
-
D
Argon
18
What color is copper sulfate pentahydrate typically?
-
A
Red
-
B
Blue
-
C
Yellow
-
D
White
19
Which gas is produced when vinegar reacts with baking soda?
-
A
Oxygen
-
B
Carbon dioxide
-
C
Nitrogen
-
D
Methane
20
What is the lightest element in the periodic table?
-
A
Helium
-
B
Hydrogen
-
C
Lithium
-
D
Oxygen
21
Which noble gas is commonly used in lighting signs to create a red-orange glow?
-
A
Helium
-
B
Neon
-
C
Argon
-
D
Xenon
22
What is the main component of natural gas?
-
A
Ethane
-
B
Methane
-
C
Propane
-
D
Butane
23
Which particle is found in the nucleus of an atom and has no electrical charge?
-
A
Proton
-
B
Electron
-
C
Neutron
-
D
Ion
24
What is the process of a liquid turning into a gas called?
-
A
Freezing
-
B
Condensation
-
C
Evaporation
-
D
Melting
25
Which element is abbreviated as 'Fe'?
-
A
Fluorine
-
B
Francium
-
C
Iron
-
D
Fermium
