Periodic Table

Which of the following atomic symbols for bromine is written correctly?

• bR
• BR
• Br
• br

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

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Tags

NGSS.HS-PS1-1

What does 12.011 represent?

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

Tags

NGSS.HS-PS1-1

What does the 6 represent?

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

Tags

NGSS.HS-PS1-1

These are found on the Periodic Table.

• Compounds
• Elements
• Mixtures

Tags

NGSS.HS-PS1-1

All matter is made of .....

• energy 
• atoms 
• air
• chemistry

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

An element's identity is determined by the number of

• electrons.
• protons.
• neutrons.
• valence.

Each column in the periodic table is called a 

• period
• group
• cluster
• unit