Periodic Table

Front

What are the horizontal rows in the Periodic Table called?

Back

Periods

Front

What does the atomic number represent in an element square?

Back

The number of protons in the nucleus of an atom.

Front

What does an atom of the element with atomic number 6 have?

Back

Six protons in its nucleus.

Front

In which period is Sodium (Na) found?

Back

Period 3

Front

What is all matter made of?

Back

Atoms.

Tags

NGSS.MS-PS1-1

Front

What are the vertical columns in the Periodic Table called?

Back

Groups or families.

Front

What is the significance of the atomic mass in an element?

Back

It represents the average mass of an atom of an element, accounting for isotopes.

Tags

NGSS.MS-PS1-5

Front

What is the symbol for Aluminum?

Back

Al

Front

How many electrons does a neutral atom of Carbon (atomic number 6) have?

Back

Six electrons.

Front

What is the relationship between atomic number and element identity?

Back

The atomic number uniquely identifies an element.