Periodic Table

a collection of atoms of one type that cannot be broken down into simpler substances by ordinary chemical or physical means

• element

• subatomic particle

• electron

• matter

an arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column and properties repeat from row to row

• Periodic Table of Elements

• Atomic Theory

• Isotopes

• Subatomic Particles

one or two letters that represent the name of an element

• element name

• element symbol

• atomic number

• atomic mass

a unique number for each element that equals the number of protons in an atom of that element

• element name

• element symbol

• atomic number

• atomic mass

a row on the Periodic Table of Elements

• family

• period

• row

• isotope

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers

The Modern Periodic Table of Elements is arranged by

• atomic mass
• atomic number
• valence electrons
• number of isotopes

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

What does the 6 represent?

• atomic mass
• atomic number
• element name
• chemical symbol