8.5ABC Practice

Which of the following best describes an electron?

• It has no charge and about the same mass as a proton.
• It has a negative charge and much less mass than a proton. 
• It has a positive charge and much more mass than a neutron.
• It has a negative charge and about the same mass as  a neutron.

Protons identify elements. What element has 5 protons? 

• Beryllium
• Boron
• Carbon
• Oxygen

Which group is more reactive, group 18 or group 1?

• group 1
• group 18

Tags

NGSS.MS-PS1-2

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

• groups

• towers

• periods

• atomic numbers

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Sodium (Na) is found in period 

• 3
• 2
• 4
• 1

Tags

NGSS.HS-PS1-1

Sodium (Na) is found in group 

• 1
• 2
• 3
• 4

What does 12.011 represent?

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

Tags

NGSS.MS-PS1-1

What does the C represent?

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

Tags

NGSS.MS-PS1-1

The horizontal (side to side) rows in the Periodic Table are called

• groups

• families

• periods

• atomic numbers

An element's identity is determined by the number of

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