Elementary Chemistry Concepts

Chemistry

A set of challenging chemistry questions focused on fundamental states of matter, properties, and basic chemical reactions.

science matter atoms

8 Questions Hard Ages 5+ Apr 23, 2026

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About this Study Set

This study set covers Chemistry through 8 practice questions. A set of challenging chemistry questions focused on fundamental states of matter, properties, and basic chemical reactions. Every question includes the correct answer so you can learn as you go — pick any format above to get started.

Questions & Answers

Browse all 8 questions from the Elementary Chemistry Concepts study set below. Each question shows the correct answer — select a study format above to practice interactively.

1 Which state of matter has particles that are packed tightly together and vibrate in a fixed position?

A Liquid
B Gas
C Plasma
D Solid

2 What is the chemical name for the substance commonly known as table salt?

A Sodium chloride
B Calcium carbonate
C Magnesium sulfate
D Potassium nitrate

3 Which of these processes describes a substance changing from a gas directly to a solid without becoming a liquid first?

A Evaporation
B Condensation
C Deposition
D Sublimation

4 Which element is represented by the chemical symbol 'Fe' on the periodic table?

A Fluorine
B Iron
C Francium
D Fermium

5 What is the pH value of pure water at room temperature, considered to be neutral?

A 0
B 7
C 10
D 14

6 Which gas makes up approximately 78% of Earth's atmosphere?

A Oxygen
B Carbon dioxide
C Nitrogen
D Hydrogen

7 When vinegar (an acid) is mixed with baking soda (a base), which gas is produced to create bubbles?

A Oxygen
B Carbon dioxide
C Helium
D Methane

8 Which term describes a mixture where one substance is evenly dissolved into another, such as salt in water?

A Suspension
B Colloid
C Solution
D Emulsion

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