Periodic table and elements

Front

What does the atomic number represent?

Back

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

Front

What is the chemical symbol for Aluminum?

Back

The chemical symbol for Aluminum is Al.

Front

How many elements were on the original periodic table?

Back

There were 63 elements on the original periodic table.

Front

What is the element name for the symbol Be?

Back

The element name for the symbol Be is Beryllium.

Front

How were the elements on the periodic table originally arranged?

Back

The elements were originally arranged by their physical and chemical properties.

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.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number.

Front

What does the atomic mass represent?

Back

The atomic mass represents the average mass of an element's atoms, measured in atomic mass units (amu).

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element.

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar chemical properties.