Periodic table of elements

Front

What does the atomic mass of an element represent?

Back

The atomic mass represents the average mass of an atom of an element, measured in atomic mass units (amu), which accounts for the number of protons and neutrons in the nucleus.

Front

What is the chemical symbol for Lithium?

Back

Li

Front

What is the definition of an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means and is made up of atoms that all have the same number of protons.

Front

What is the chemical symbol for Calcium?

Back

Ca

Front

What is the chemical symbol for Carbon?

Back

C

Front

How are elements arranged in the periodic table?

Back

Elements are arranged in the periodic table by increasing atomic number, which corresponds to the number of protons in the nucleus of an atom.

Front

What is the significance of the periodic table in chemistry?

Back

The periodic table organizes elements based on their properties, allowing for the prediction of chemical behavior and relationships between different elements.

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

What is the difference between a compound and an element?

Back

A compound is a substance formed when two or more elements chemically bond together, while an element is a pure substance that cannot be broken down into simpler substances.

Front

What are the three main categories of elements in the periodic table?

Back

The three main categories are metals, nonmetals, and metalloids.