Development of Atomic Theory - Jennifer True | Biblioteka

1

Describe Democritus's model of the atom

A the plum-pudding model

B a small solid sphere

C the planetary model

D the nuclear model

1

Click all that apply to Dalton's atomic theory

atoms are indivisible

all atoms of the same element are alike

Compounds form when atoms of different elements combine in whole number ratios

atoms contain subatomic particles

all matter is made up of atoms

1

The Greek philosopher Democritus was one of the first to suggest the existence of atoms.

Tačno

Netačno

1

The word "atomos" is greek for _____________

invisible

indivisible

atoms

divisible

1

What did J.J. Thomson discover?

A nucleus

B proton

C electron

D neutron

1

Check all that apply to J.J. Thomas's atomic theory

A discovered the electron

B discovered the neutron

C the plum-pudding model

D each atom was a square that was filled with positively charged fluid

electrons were represnted as "plums" while the "pudding" was positively charged

studied the behavior of cathode rays when exposed to a magnetic field

1

Which Scientist used the "Gold-Foil Experiment"

A Democritus

B Rutherford

C Aristotle

D Thomas

1

Who discovered the nucleus?

A Rutherford

B Thomas

C Democritus

D Dalton

1

In Rutherfords model, what is the charge of the nucleus?

no charge

positive

negative

1

Check all that Rutherford and his team concluded.

atoms contain electrons

there is a small core to the atom

the positive charge of an atom is found in the nucleus

atoms contain neutrons

Most of the atom is empty space, where the low mass electrons are found.