Chemistry Basics for Nail Professionals

A/an ________ is the basic unit of a chemical element.

• Ion

• Atom

• Molecule

• Element

Why are molecules made from combining the atoms of one type of element called elemental molecules?

• Because they consist of only one type of element

• Because they are always charged

• Because they are always compounds

• Because they contain electrons

Which of the following is an example of a compound molecule?

• Oxygen (O2)

• Water (H2O)

• Nitrogen (N2)

• Helium (He)

What is the main difference between vapor and gas according to the material?

• Vapor is a solid, while gas is a liquid.

• Vapor is a liquid that has evaporated into tiny droplets, while gas does not have a definite volume or shape.

• Vapor has a definite shape, while gas does not.

• Vapor is always visible, while gas is not.

A student observes steam coming from a humidifier. Which state of matter is the steam an example of?

• Solid

• Liquid

• Vapor

• Plasma

Compound molecules are made by combining _______ from different elements.

• Ions

• Atoms

• Anions

• Molecules

How many months of repeated direct exposure before someone can start to show symptoms of an allergy to a product?

• 9-12

• 4-6

• 1-3

• 6-9

Why is water called the universal solvent?

• Because it can dissolve more substances than any known solvent.

• Because it is always neutral.

• Because it forms suspensions easily.

• Because it is a type of colloid.

What is the main reason for checking the expiration date when purchasing liquid products for nail technicians?

• To ensure the product is used before it loses its strength

• To get a discount on older products

• To avoid buying products in large quantities

• To check for color changes in the liquid

Which of the following best describes the difference between miscible and immiscible liquids?

• Miscible liquids blend to form a stable solution, while immiscible liquids do not mix and separate quickly

• Miscible liquids evaporate faster than immiscible liquids

• Immiscible liquids are always colored, while miscible liquids are clear

• Miscible liquids are always thicker than immiscible liquids