Atomic Structure Review

Front

When an electron absorbs energy and moves to a higher energy level, this process is called:

Back

Excitation

Front

What happens when electrons in excited atoms return to their ground state?

Back

They release photons of light.

Front

Which scientist is credited with the discovery of the electron using the cathode ray tube experiment?

Back

b) J.J. Thomson

Front

Who proposed the planetary model of the atom, in which electrons orbit the nucleus in defined paths?

Back

c) Niels Bohr

Front

How many neutrons are in the most common isotope of carbon, carbon-12?

Back

6

Front

How many electrons does an aluminum ion with a +3 charge (Al³⁺) have?

Back

10

Front

Which of the following pairs are isotopes of each other?

Back

¹⁴C and ¹²C

Front

Which statement correctly compares the masses of subatomic particles?

Back

Protons have a mass much larger than electrons.

Front

Which subatomic particles are located in the nucleus of an atom?

Back

Protons and neutrons

Front

Which subatomic particle carries a negative electric charge?

Back

Electron