Periodic Trends Scientist

Question 1

Noticed that some elements had similar chemical and physical properties

Answer 1

Mendeleev

Question 2

suggested that atoms had negatively charged electrons

Answer 2

Thomson’s model

Question 3

an atom was mostly open space. The “6+” in the model means that there are six protons in the nucleus. Had gold foil experiment

Answer 3

Rutherford

Question 4

suggested that electrons move in specific orbits around the nucleus of an atom

Answer 4

Niels Bohr

Question 5

thought that atoms were smooth, hard balls.

Answer 5

Dalton