Chemical Concepts and Bonding

Questions and Answers

What is a mixture that contains insoluble particles that are large enough to be visible?

Suspension (correct)

Colloid

Solution

Emulsion

If a molecule contains only carbon and hydrogen, it is .

Non-polar covalent

Which parts of atoms can interact (react) to form chemical bonds?

Valence electrons

Are atoms of oxygen stable, and why or why not?

No, because the atoms have only 6 valence electrons, but need 8 for stability. Signup and view all the answers

Do carbon atoms react with other atoms, and why or why not?

Yes, because they can become more stable by doing so. Signup and view all the answers

Which of the following is not produced through chemical bonding?

Atoms Signup and view all the answers

What happens in oxidation-reduction (redox) reactions?

Electron exchange occurs. Signup and view all the answers

What characteristic of water is demonstrated when foods are broken down into their building blocks by adding water?

Water acts as a reactant. Signup and view all the answers

How does water dissolve salt (NaCl) in your mouth?

Water acts as a solvent because the partial negative charge on the oxygen in water attracts sodium, while the partial positive charge on hydrogen attracts chloride. Signup and view all the answers

In plasma, a typical body fluid, what would a protein floating around be considered?

A solute, specifically both a colloid and an electrolyte. Signup and view all the answers

Which type of lipid would cortisol be classified as?

Steroid Signup and view all the answers

What type of compound is NOT likely to dissolve in water?

Non-polar covalent bond Signup and view all the answers

Which two organ systems work to maintain pH balance in the body?

Urinary and Respiratory Signup and view all the answers

Study Notes

Mixtures and Chemical Concepts

A suspension is a mixture with visible, insoluble particles.
Molecules containing only carbon and hydrogen are referred to as non-polar covalent compounds.
Valence electrons are the reactive parts of atoms involved in forming chemical bonds.

Atomic Stability

Atoms of oxygen, with a total of 8 electrons but only 6 valence electrons, are unstable since they require 8 for stability.
Carbon atoms possess four valence electrons, making them likely to react with other atoms for increased stability.

Chemical Bonding

Atoms are not products of chemical bonding; they are the fundamental components that bond to form larger structures such as adipose tissue, cells, and organs like the heart.
Oxidation-reduction (redox) reactions involve the exchange of electrons between reacting species.

Properties of Water

Water facilitates the breakdown of food into building blocks by acting as a reactant.
Water’s solvent properties enable it to dissolve substances like salt (NaCl) by separating sodium and chloride ions due to charge interactions.

Colloids and Electrolytes

In body fluids like plasma, proteins are considered solutes, often categorized as colloids and electrolytes due to their charged nature.

Lipids and Compounds

Cortisol, a lipid hormone, is classified as a steroid.
Compounds that are non-polar covalent are generally insoluble in water due to their inability to interact with polar solvents.

pH Balance

The body maintains pH balance through the functioning of the urinary and respiratory systems.

Description

Test your knowledge on mixtures, atomic stability, and chemical bonding with this quiz. Explore the properties of water and the role of valence electrons in reactions. Understand key concepts that govern chemical interactions and stability.