Periodic Table

Front

What is an electron?

Back

An electron is a subatomic particle with a negative charge that orbits the nucleus of an atom.

Front

How is the Modern Periodic Table of Elements arranged?

Back

The Modern Periodic Table is arranged by atomic number, which is the number of protons in an atom's nucleus.

Front

What is the basic building block of all matter?

Back

All matter is made of atoms.

Front

What does the number 12.011 represent in the periodic table?

Back

The number 12.011 represents the atomic mass of the element carbon.

Front

What does atomic mass indicate?

Back

Atomic mass indicates the total number of protons and neutrons in an atom's nucleus.

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 are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter abbreviation used to represent an element on the periodic table.

Front

What is the significance of valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom and are important for chemical bonding.

Front

What is the difference between atomic mass and atomic weight?

Back

Atomic mass is the mass of a single atom, while atomic weight is the average mass of an element's isotopes, weighted by their natural abundance.