The Atomic Nucleus - Gold Foil Experiment

1.

Multiple Choice

45 sec

1 pt

Choose the correct description of J. J. Thomson's Model of an Atom.

The model is a indivisible and indestructible sphere

The model is a sphere in which negatively charged particles - electrons- immersed in a positively charged space of the sphere.

The model is a sphere in which negatively charged particles - electrons- move around the center of an atom creating an electron cloud

The model is a sphere in which negatively charged particles - electrons - move around the nucleus of an atom in a defined passes, called orbits, like planets around the sun

2.

Multiple Choice

30 sec

1 pt

What is the name of J.J. Thomson's Model of an Atom?

Jimmy Neutron Model

Solar System Model

Plum-Pudding Model

Quantum mechanical Model

3.

Multiple Choice

30 sec

1 pt

Who was Ernset Rutherford?

English Science teacher who developed the first Atomic Theory

English physicist who discovered an electron

German physicist who discovered a proton

New Zealand born physicist who established existence of a positively charged nucleus in an atom

4.

Multiple Choice

30 sec

1 pt

Why did Ernest Rutherford and his colleagues perform the Gold-Foil Experiment?

They wanted to test and confirm the Plum-Pudding model

They wanted to test John Dalton's Model

They were looking for electrons

They wanted to come up with their own Atomic Model

5.

Multiple Choice

30 sec

1 pt

What is an alpha particle?

It is a dominant particle in a subatomic world

It is a particle that has 2+ charge

It is a particle that has 2- charge

It is a helium atom without a charge

6.

Multiple Choice

30 sec

1 pt

What results did Rutherford expect to see if the Plum-Pudding model is correct?

He expected that most of alpha particles would go through a gold-foil and small number of particles would deflect sightly

He expected that most of alpha particles would not go through a gold-foil and will stop on one side of a foil.

He expected that most of alpha particles would ricochet back after hitting a gold-foil

7.

Multiple Choice

30 sec

1 pt

What results did Rutherford observe in his Gold-Foil experiment?

He observed that all alpha particles did go through a gold-foil in straight lines

He observed that most alpha particles did not go through a gold-foil and stopped on one side of the gold foil.

He observed that a small number of alpha particles bounced off the gold-foil at very large angles

He observed that all alpha particles slightly deflected from the straight line when going through a gold-foil

8.

Multiple Choice

30 sec

1 pt

Choose one of the conclusions that Ernest Rutherford made based on the experimental results of his Gold-Foil experiment

He concluded that the atom is indivisible

He concluded that the atom is mostly empty space

He concluded that the atom has neutrons

He concluded that the atom is tightly packed with subatomic particles all mixed together

9.

Multiple Choice

30 sec

1 pt

Choose one of the conclusions that Ernest Rutherford made about the mass of the atom, based on the experimental results of his Gold-Foil experiment

He concluded that almost all mass of the atom is distributed evenly among subatomic particles

He concluded that almost all mass of the atom is distributed among electrons

He concluded that almost all mass of the atom is concentrated in a small region, in a center of an atom, that has a positive charge

He concluded that almost all mass of the atom is concentrated in a small region, in a center of an atom, that has a negative charge

10.

Multiple Choice

30 sec

1 pt

Based on the experimental results of his Gold-Foil experiment, Ernest Rutherford concluded that

The very dense center of the atom has a positive charge

The very dense center of the atom has a negative charge

The very dense center of the atom has no charge

The atom doesn't have a center and all particles are distributed evenly like in a chocolate chip cookie

11.

Multiple Choice

30 sec

1 pt

What is the nucleus of the atom?

It is a centra organel of a cell

It is a center of a fruit

It is a very dense cenral core of an atom that has a positive charge

It is a very dense cenral core of an atom that has a negative charge

12.

Multiple Choice

30 sec

1 pt

What subatomic particles are in the nucleus of an atom?

Only protons

Protons and neutrons

Only neutrons

Only electrons

Protons and electrons

13.

Multiple Choice

30 sec

1 pt

Based on Rutherford's model of the atom, electrons in the atom are located

inside of the nucleus of the atom

outside and around the nucleus of the atom

outside and inside of the nucleus of the atom

14.

Multiple Choice

30 sec

1 pt

What is the average size of an atom?

1 nm

1 m

1 ⁰A

1 pm

15.

Multiple Choice

30 sec

1 pt

If the atom has 25 electrons, how many protons does it need to have to be neutral?

5 protons

25 protons

it doesn't need protons

15 protons

16.

Multiple Choice

30 sec

1 pt

If one of the reagent of a chemical reaction is a piece of copper metal, what would happen with copper at the end of the reaction?

Copper will transform into another metal, like gold

Copper will stay copper but may combine with atoms of other elements in the reaction, forming a new substance

Copper will not combine with atoms of other elements and we will be able to get it back by simple filtration

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