electrons in atom

Each element on the periodic table can be identified by its

• state of matter

• location on the table

• unique spectral

• ability to react

What subatomic particle is responsible for the spectral line seen in emission spectra

• protons

• electrons

• neutron

• nuclues

What causes an electron to leave its ground state and jump to an excited state?

• Absorption of a photon

• emission of a photon

• absorption of an electron

• Emission of an electron

True or False: The ground state is the highest energy state of an atom.

• True

• False

For an electron to change from ground state to an excited stated it must...

• Absorb energy
• Release energy

Line emission spectrum shown below happens when

• Electron transition from lower to higher energy level.
• Electron transition from higher to lower energy level.
• Electron exist in fixed energy states
• Electron transition between different energy levels.

Emission of light from an atom occurs when an electron

• drops from a higher to a lower energy level.
•    jumps from a lower to a higher energy level.   
•    moves within its atomic orbital.
• falls into the nucleus.

If an electron moves from n=4 to n=2 it ____

• absorbs energy

• releases energy

Look carefully at the picture. It shows an electron in the excited state on the left, and the electron returning to its ground state on the right. When the electron return to the ground state it emits a_______________________.

• blast of cold air

• electrostatic charge

• proton

• photon (light)

The picture shows an atom in the ground state absorbing energy and the electron jumps to the excited state. Which state has higher energy?

• Ground State

• Excited State