Elements, Compounds and Mixtures

Front

What is an Element?

Back

A substance that contains only one kind of atom.

Front

What is a Compound?

Back

A substance formed when two or more different atoms are chemically bonded together.

Front

What is a Mixture?

Back

A combination of two or more substances that are not chemically bonded.

Front

What does H2SO4 consist of?

Back

2 hydrogen, 1 sulfur, 4 oxygen.

Front

How many elements are in Na2CO3?

Back

3 elements: Sodium (Na), Carbon (C), and Oxygen (O).

Front

Which of the following is not a compound: HCl, Cl, NaCl, CO2?

Back

Cl is not a compound; it is an element.

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

Can a mixture be separated by physical means?

Back

Yes, mixtures can be separated by physical methods such as filtration or distillation.

Front

What is the chemical formula for water?

Back

H2O, which consists of 2 hydrogen atoms and 1 oxygen atom.

Front

What is the main characteristic of a homogeneous mixture?

Back

A homogeneous mixture has a uniform composition throughout.