The options for the answers to the questions are in bold. A layer of ozone (O3)

Question

The options for the answers to the questions are in bold.

A layer of ozone (O3) is the lower stratosphere keeps abou 95% of the sun's harmful ultraviolet radiation from reaching the earth's surface. In this reaction, ozone absorbs the ultraviolet radiation, which results in ozone splitting up into an oxygen atom (O) and oxygen molecule (O2):

1.) This is an example of a

A.) physical

B.) chemical

reaction, beacause the chemical components of the initial reactants and the resulting products involved has

A.) changed

B.) remained the same.

2.) In this reaction, ozone is

A.) an ion

B.) a molecule

C.) an organic compound

that is made up of three

A.) atoms

B.) isotopes

C.) elements.

3.) Accounting for nearly half of the mass of the earth's crust, 2/3 of the mass of a human body, and 9/10 of the mass of water, oxygen has an atomic number of 8 and a mass number of 16. This means that in its nucleus, there are

A.) 2

B.) 8

C.) 16

protons and neutrons.

Explanation / Answer

O3(g) ---> O(g) + O2(g)

1. B.) chemical

reaction, beacause the chemical components of the initial reactants and the resulting products involved has

A.) changed

2.ozone is   B.) a molecule

that is made up of three

A.) atoms

3. This means that in its nucleus, there are

B) 8

protons and neutrons.

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