Flashcard 2.1

Front

How many Hydrogen atoms are in 4H₂O?

Back

8

Front

What happens to the wick of a candle after blowing out the flame?

Back

The wick changes from white to black, indicating a Chemical Change.

Front

What are Carbon (C) and Hydrogen (H) classified as?

Back

Carbon and Hydrogen are elements.

Front

What do Carbon and Hydrogen combine to form?

Back

They chemically combine to form Methane (CH₄).

Front

What particles make up the nucleus of an atom?

Back

Protons and Neutrons.

Front

What is a compound?

Back

A substance in which the atoms of two or more elements are combined together.

Front

What is the difference between an element and a compound?

Back

An element is made of one type of atom, while a compound is made of two or more different types of atoms.

Front

What is a physical change?

Back

A change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

Back

A change that results in the formation of new chemical substances.

Front

What is the definition of an atom?

Back

The smallest unit of a chemical element, consisting of a nucleus surrounded by electrons.