H2O Quiz Lessons 8-11

The smallest unit of matter is -

• element

• proton

• atom

• compound

What is an element?

• a chemical gas

• a chemical compound

• pure substance made of several atoms

• pure substance made of only one type of atom

What are the two most common elements found in 4 different locations on Earth?

• nitrogen and hydrogen

• hydrogen and oxygen

• nitrogen and oxygen

• carbon and hydrogen

What are the reactants and products of a chemical equation?

• Products are the starting material for a chemical reaction and the reactants are the resulting materials from the reaction

• Reactants are the starting material for a chemical reaction and the products are the resulting materials from the reaction

• reactants and products are the elements you bring together to make a new material

• Reactants and products are found on the same side of the chemical equation.

The diagram shows the geometric structure of two atoms of hydrogen and one atom of oxygen combined to form a molecule of water (H2O).

• mixtures

• atoms

• elements

• bonds

Tags

NGSS.MS-PS1-1

Oxygen gas is written O2, which means it is a molecule made from two oxygen atoms. How could oxygen gas be classified?

• Greenhouse gas

• compound

• element

• noble gas

Tags

NGSS.MS-PS1-1

A substance made up of two or more different elements that have been chemically combined is called -

• atom

• compound

• element

• mixture

According to this equation, what happened to the carbon and oxygen?

• They combined physically to form a new element

• They combined chemically to form carbon and oxygen

• They combined chemically to form a new compound

• They combined physically to form a new mixture

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

The structure of an atom is shown. Which of these correctly represents the labeled parts, 1, 2, 3, and 4?

• 1. nucleus 2. electron 3. proton 4. neutron

• 1. nucleus 2. electron 3. neutron 4. proton

• 1. nucleus 2. proton 3. neutron 4. electron

• 1. proton 2. neutron 3. electron 4. nucleus

Tags

NGSS.MS-PS1-1

What does the subscript represent?

• the number of atoms of an element in a compound

• the number of elements in a compound

• the number of molecules in a chemical formula

• the number of atoms that can be combined