Chemistry, First Semester Review

Front

How many valence electrons does Aluminum have?

Back

Aluminum has 3 valence electrons.

Front

What element is represented in a Bohr Model with 3 electrons?

Back

The element is Lithium.

Front

Which color of visible light has the shortest wavelength?

Back

Violet has the shortest wavelength and the most energy.

Front

Which of the following is NOT an example of matter: Air, Heat, Smoke, Water Vapor?

Back

Heat is NOT an example of matter.

Front

Which subatomic particle is negatively charged?

Back

The electron is the negatively charged subatomic particle.

Front

What is the definition of matter?

Back

Matter is anything that has mass and takes up space.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the difference between an element and a compound?

Back

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