Fall Benchmark Exam Review

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

How do you calculate the number of neutrons in an atom?

Back

Number of neutrons = Mass number - Atomic number.

Front

What is percent error and how is it calculated?

Back

Percent error is a measure of how inaccurate a measurement is, calculated as: Percent Error = |(Accepted Value - Experimental Value)| / Accepted Value x 100%.

Front

What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture that has a uniform composition throughout, such as saltwater or air.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus of an atom.

Front

What is the electron configuration of an atom?

Back

The electron configuration describes the distribution of electrons in an atom's orbitals.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configurations, and recurring chemical properties.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.

Front

What is the role of protons in an atom?

Back

Protons determine the atomic number and identity of an element, and they contribute to the atomic mass.