Key Words

• absolute zero

• absorption line spectrum

• atom

• atomic number

• Balmer line

• Balmer series

• blackbody

• blackbody curve

• blackbody radiation

• blueshift

• Bohr orbits

• continuous spectrum

• degrees Celsius

• degrees Fahrenheit

• Doppler effect

• electromagnetic radiation

• electromagnetic spectrum

• electromagnetism

• electron

• electron volt

• element

• emission line spectrum

• energy flux

• energy level

• energy-level diagram

• excited state

• Frequency

• gamma rays

• ground state

• infrared radiation

• Ionization

• isotope