Northern Lights Review

Which of the following is an ELEMENT?

• O₂

• CO₂

• H₂O

• H

Which of the following is a COMPOUND?

• H2O

• O

• Be

• Na

Tags

NGSS.MS-PS1-1

How many valence electrons does Argon have?

• 18

• 10

• 8

• 6

Which of the following has 2 energy levels?

• Oxygen (O)
• Sodium (Na)

• Helium (He)
• Argon (Ar)

Which of the following has 4 valence electrons?

• Carbon (C)
• Oxygen (O)
• Helium (He)
• Nitrogen (N)

Tags

NGSS.MS-PS1-1

Which of the following shows Neon in an excited state?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-4

Which of the following is a mixture?

• Air
• Sugar
• Salt
• Water

Which of the following shows a model of nitrogen?

(select all that apply)

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Using the image, identify which PERIOD the element is in.

• Period 1
• Period 3
• Period 2
• Period 4

Tags

NGSS.HS-PS1-1

Using the image, identify which GROUP the element is in.

• Group 1
• Group 4
• Group 3
• Group 2

Tags

NGSS.MS-PS1-1