Properties of Elements

Front

What are noble gases?

Back

Noble gases are elements that are gases at room temperature and are not reactive. Examples include helium, neon, argon, krypton, xenon, and radon.

Front

How many types of subatomic particles are in an atom?

Back

An atom is made up of three different types of subatomic particles: protons, neutrons, and electrons.

Front

What does the numbered row in the Periodic Table indicate?

Back

The numbered row of the Periodic Table indicates the number of energy levels an element has.

Front

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

Back

To find the number of neutrons, subtract the atomic number from the atomic mass.

Front

What are metals?

Back

Metals are elements that are good conductors of electricity, often shiny solids at room temperature. Examples include iron, copper, and gold.

Front

What are non-metals?

Back

Non-metals are elements that are generally poor conductors of heat and electricity. Examples include oxygen, carbon, and sulfur.

Front

What are metalloids?

Back

Metalloids are elements that have properties of both metals and non-metals. Examples include silicon and germanium.

Front

What is an atom?

Back

An atom is the smallest unit of an element that retains the properties of that element.

Front

What is the atomic number?

Back

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

Front

What is atomic mass?

Back

Atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).