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Chemistry Trivia Questions and Answers
10 free chemistry trivia questions with answers and explanations.
1What is the atomic number of gold (Au)?
A47
B79✓
C89
D197
💡 Explanation: Gold has atomic number 79, meaning it has 79 protons in its nucleus. Its symbol Au comes from the Latin word "aurum."
2What is the most abundant gas in Earth's atmosphere?
AOxygen
BCarbon Dioxide
CNitrogen✓
DArgon
💡 Explanation: Nitrogen makes up about 78% of Earth's atmosphere. Oxygen is second at 21%, with argon and other gases making up the rest.
3What is H₂O commonly known as?
ASalt
BWater✓
CHydrogen peroxide
DAmmonia
💡 Explanation: H₂O is water — two hydrogen atoms bonded to one oxygen atom. It is essential for all known forms of life.
4What is the chemical symbol for sodium?
ASo
BSd
CNa✓
DNm
💡 Explanation: Sodium's chemical symbol is Na, derived from the Latin word "natrium." It is a highly reactive alkali metal.
5What is the chemical symbol for iron?
AIr
BIn
CFe✓
DI
💡 Explanation: Iron's symbol Fe comes from its Latin name, ferrum. Ir is iridium, In is indium and I is iodine.
6What is the pH of pure water at 25°C?
A0
B7✓
C10
D14
💡 Explanation: Pure water is neutral with a pH of 7 at 25°C. Values below 7 are acidic and values above 7 are basic (alkaline).
7Which element has the atomic number 1?
AHelium
BOxygen
CCarbon
DHydrogen✓
💡 Explanation: Hydrogen has one proton, giving it atomic number 1. It is the lightest and most abundant element in the universe.
8What is the chemical formula for table salt?
ANaCl✓
BKCl
CNaOH
DCaCO3
💡 Explanation: Table salt is sodium chloride, NaCl, made of sodium and chlorine ions in a 1:1 ratio.
9Which noble gas glows red-orange in classic advertising signs?
AArgon
BNeon✓
CKrypton
DXenon
💡 Explanation: Neon glows a bright red-orange when electricity passes through it. Signs in other colors often use different gases or coated glass.
10What type of chemical bond forms when two atoms share electrons?
AIonic bond
BMetallic bond
CCovalent bond✓
DHydrogen bond
💡 Explanation: In a covalent bond, atoms share pairs of electrons, as in a water molecule. In an ionic bond, electrons are transferred from one atom to another.
About Chemistry Trivia Questions
These chemistry trivia questions cover a wide range of topics within the chemistry category. All questions include four multiple-choice options (A, B, C, D) and a detailed answer explanation to help you understand the topic better.
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