Flame Test

What is the color of the light that sodium compounds give off?

• Green

• Red

• Violet

• Yellow-orange

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

What is the state when electrons move to a higher energy level upon absorption of energy?

• active

• inactive

• excited

• ground

What compound gives off bright red color when heated over a flame?

• Lithium

• Calcium

• Strontium

• Potassium

What particles in the heated compounds are responsible for the production of the colored light?

• proton

• neutron

• electron

• proton and neutron

Tags

NGSS.HS-PS1-2

NGSS.HS-PS4-3

NGSS.HS-PS4-4

What is the color of the light that potassium compounds give off?

• Yellow-orange

• Lavender (Violet)

• Pinkish red

• Green

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

What is the color of the light that calcium compounds give off?

• Yellow

• Orange

• Blue-green

• Purple

Tags

NGSS.HS-PS1-1

NGSS.HS-PS4-3

If electrons gain energy they 

• move up one or more shells
• more down one or more shells

Metal ion with a lilac flame

• Na⁺
• K⁺
• Na²⁺
• K²⁺

Absorption of energy by an electron results in 

• it moving from the ground to an excited state
• it moving from an excited to the ground state
• the emission of a photon
• it moving from an excited to the ground state and the emission of a photon

Tags

NGSS.HS-PS1-2

What charge does an electron have?

• Negative
• Positive
• Neutral

Tags

NGSS.HS-PS2-4