Evidence for Electron Shells

What happens when an electron absorbs energy?

• It falls to a lower level

• It is destroyed

• It jumps to a higher energy level

• It turns into a proton

What is released when an electron falls back down to a lower energy level?

• Heat

• Light

• Electricity

• Protons

Which of the following best describes the Bohr model?

• Electrons are scattered randomly in the atom

• Electrons orbit the nucleus in fixed energy levels

• Electrons stay still in one spot

• Electrons orbit protons in circular paths only

The unique set of coloured lines emitted by an element is called its:

• Chemical formula

• Energy shell

• Atomic fingerprint

• Emission spectrum

The absorption spectrum looks like:

• A rainbow with black lines missing

• A black background with coloured lines

• A grey blur

• A solid white line