Atomic Structure

Question 1

What did John Dalton contribute to the atomic structure?

Answer 1

• Atoms are indivisible
• Atoms of the same element are identical
• Compounds are combinations of different types of atoms

Question 2

What did JJ Thompson contribute to the atomic structure?

Answer 2

• Discovered the electron

- Produced the plum pudding model

Question 3

What did Ernest Rutherford contribute to the atomic structure?

Answer 3

• The gold foil experiment

- Most of the atom consists of empty space

Question 4

What did Neils Bohr contribute to the atomic structure?

Answer 4

• Electrons orbit the nucleus

- Electrons cannot occupy values of energies

Question 5

What did James Chadwick contribute to the atomic structure?

Answer 5

• Discovered the neutron

- Nucleus consists of neutrons and protons

Question 6

What is an isotope?

Answer 6

An isotope is when an atom has the same number of protons, but differing numbers of neutrons

Question 7

What are the stages of Mass Spectroscopy?

Answer 7

1 - A sample is injected into the MS via injection, or a solid sample, which gets vaporized
2 - The vaporised sample is ionised/given a charge, and then accelerated in a high voltage electric field
3 - A detector measures the intensity of the beam

Question 8

What is AAS?

Answer 8

• Atomic absorbtion spectroscopy