BS Chemistry Fundamentals

Question 1

What is an atom?

Accepted Answer

The smallest unit of an element that retains the chemical properties of that element

Answer

A molecule consisting of two or more elements bonded together

Answer

A subatomic particle found in the nucleus

Answer

A compound formed by ionic bonding

Question 2

What determines the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

Answer

The number of neutrons in the nucleus

Answer

The total number of protons and neutrons

Answer

The number of electrons in the outer shell

Question 3

What is a covalent bond?

Accepted Answer

A chemical bond formed by the sharing of electrons between atoms

Answer

A bond formed by the transfer of electrons from one atom to another

Answer

An attraction between oppositely charged ions

Answer

A weak intermolecular force between molecules

Question 4

What is pH a measure of?

Accepted Answer

The concentration of hydrogen ions in a solution

Answer

The concentration of hydroxide ions in a solution

Answer

The buffering capacity of a solution

Answer

The total dissolved solids in a solution

Question 5

What is a chemical reaction?

Accepted Answer

A process in which substances are transformed into different substances by breaking and forming chemical bonds

Answer

A change in the physical state of a substance without altering its composition

Answer

The mixing of two substances without any bond changes

Answer

The dissolution of a solid in a liquid

Question 6

What is the law of conservation of mass?

Accepted Answer

Matter cannot be created or destroyed in a chemical reaction

Answer

The mass of a substance decreases when it is heated

Answer

Chemical reactions always produce products heavier than reactants

Answer

Energy and mass are interchangeable in chemical reactions