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

An atom is the smallest particle of an element that still has the chemical characteristics of that element.

Question 2

What determines the atomic number of an element?

Accepted Answer

The number of protons in the nucleus

Answer

The atomic number uniquely identifies an element and equals the number of protons in the nucleus of an atom of that element.

Question 3

What is a covalent bond?

Accepted Answer

A chemical bond formed by the sharing of electrons between atoms

Answer

Covalent bonds form when two atoms share one or more pairs of electrons to achieve stable electron configurations.

Question 4

What is pH a measure of?

Accepted Answer

The concentration of hydrogen ions in a solution

Answer

pH is a scale measuring the acidity or alkalinity of a solution based on the concentration of hydrogen ions (H+).

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 chemical reaction involves the rearrangement of atoms to form new substances with different properties than the reactants.

BS - Bachelor of Science Practice Test