Question

question 2: true or false: elements are fundamental units composed of a single type of atom and cannot be further broken down by chemical reactions. options: true, false. question 3: 96% of all living matters is composed of which of the following elements? (select all that apply.) options: phosphorus, hydrogen, carbon, sulfur, oxygen, nitrogen. question 4: match the subatomic particle with its charge. electron choose, proton choose, neutron choose

Explanation:

Question 2

By definition, an element is a pure substance made of only one type of atom and cannot be broken down into simpler substances by chemical reactions. So the statement is true.

In living organisms, about 96% of the mass is made up of carbon, hydrogen, oxygen, and nitrogen (CHON). Phosphorus and sulfur are part of the remaining ~4% (along with other trace elements). So the elements that make up 96% of living matter are Hydrogen, Carbon, Oxygen, and Nitrogen.

• Electrons are subatomic particles with a negative charge ($-1$).
• Protons are subatomic particles with a positive charge ($+1$).
• Neutrons are subatomic particles with no charge (neutral, charge of $0$).

So the matches are: electron - negative, proton - positive, neutron - neutral.

Answer:

True

Question 3