ELD intro to atoms review

Front

What is an atom?

Back

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

Front

What is the atomic number?

Back

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

Front

What is atomic mass?

Back

The weighted average mass of an atom's isotopes, measured in atomic mass units (amu).

Front

What is a pure substance?

Back

A material made of only one type of particle, which can be an element or a compound.

Front

What is a mixture?

Back

A combination of two or more substances that retain their individual properties.

Front

What is a compound?

Back

A substance formed when two or more elements chemically bond together.

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.

Front

What happens when two particles have the same charge?

Back

They repel each other.

Front

What happens when two particles have opposite charges?

Back

They attract each other.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their atomic number, electron configurations, and recurring chemical properties.