Fundamentals of Chemistry Quiz

What is the definition of an atom?

• The largest unit of matter that can retain properties of life.

• The smallest unit of life that can retain properties of matter.

• A molecule that forms the basis of chemical reactions.

• A particle that cannot be divided further.

Which subatomic particle has a positive charge and is located in the nucleus?

• Electron

• Neutron

• Proton

• Positron

What is the main difference between covalent and ionic bonds?

• Covalent bonds involve the transfer of electrons, while ionic bonds involve the sharing of electrons.

• Covalent bonds involve the sharing of electrons, while ionic bonds involve the gain or loss of electrons.

• Covalent bonds occur between metals, while ionic bonds occur between non-metals.

• Covalent bonds are weaker than ionic bonds.

Which part of a water molecule is positively charged?

• The oxygen atom

• The hydrogen atoms

• The entire molecule

• The electron cloud

What does the pH scale measure?

• The temperature of a solution

• The acidity or basicity of a solution

• The density of a solution

• The salinity of a solution

Which of the following describes an acid?

• More OH- ions, less H+, more than 7 on the pH scale

• More H+ ions, less OH-, less than 7 on the pH scale

• Equal H+ and OH- ions, exactly 7 on the pH scale

• Less H+ ions, more OH-, more than 7 on the pH scale

Which element is found in all organic molecules?

• Hydrogen

• Oxygen

• Nitrogen

• Carbon

Why do lipids not dissolve in water?

• They are hydrophilic.

• They are hydrophobic.

• They are ionic.

• They are polar.

What is the charge of a neutron?

• Positive

• Negative

• Neutral or no charge

• Variable

On the pH scale, what range is considered basic?

• 0-6

• 7

• 8-14

• 1-14