Atomic thoeries

Atomic thoeries

Multiple Choice

^{Matter is anything that takes up space}

• True
• False

Multiple Choice

_{Matter has to main properties mass and volume}

• True
• False

Multiple Choice

What are the states of matter?

• solid, liquid, and juice
• solid and liquid
• solid and gas
• solid, liquid, and gas

Multiple Choice

Which scientist was the first person responsible for proposing the idea of atoms?

• Democritus

• John Dalton

• Ernest Rutherford

• J.J. Thomson

• Niels Bohr

Multiple Choice

First person to propose the name ATOMOS

• Rutherford

• Democritus

• Dalton

• Bohr

Multiple Choice

He challenged Democritus's ideas and did not believe empty space existed between atoms.

• Chadwick

• Bohr

• Aristotle

• Dalton

Multiple Select

According to Aristotle, the matter was made up of:

(select more than one)

• Air

• Earth

• Fire

• Water

• Mud

Multiple Choice

What subatomic particle has a negative charge and is found outside of the nucleus?

• Electron

• Proton

• Nucleus

• Neutron

Multiple Choice

What contribution did John Dalton make to atomic theory? 

• He discovered that every atom was positively charged. 
• He discovered that every element consisted of one type of atom that couldn't be divided. 
• He discovered that atoms had nuclei. 
• He discovered that atoms could be divided into smaller parts. 

Multiple Choice

Who stated that atoms cannot be divided?

• Democritus
• Dalton
• Thomson
• Bohr

Multiple Choice

John Dalton stated:

• elements are made of atoms
• atoms of a given element are identical
• atoms cannot be subdivided, created, nor destroyed
• all of the above

Scanning tunneling microscope:

A scanning tunneling microscope (STM) is an instrument used to see atoms by using needle on the surface of material.

Multiple Choice

What can a scanning tunneling microscope (STM) be used for?

• Seeing objects very far away

• Zooming into small objects

• Creating an image of the surface of atoms

• Making large objects appear small

Multiple Choice

Dalton did not believe that atoms could be made of smaller parts

• True

• False

Multiple Choice

What is the mass number defined as?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

What is the mass number of this atom?

• 1

• 3

• 4

• 7

Atomic number:

The atomic number of an element is the number of protons found in the nucleus of every atom of that element.

Multiple Choice

What is the atomic number?

• the number of protons
• the number of protons and neutrons
• the number of neutrons
• the number of protons and electrons

Multiple Choice

What is the atomic number of this atom?

• 1
• 3
• 4
• 7

Multiple Select

What were J. J. Thomson's three contributions to the atomic theory?

• Discovered the electron

• Discovered the nucleus -did the gold foil experiment

• Used the cathode ray tube in his discovery

• Created a model of the atom with electrons moving around the nucleus in fixed orbits

• Created the "plum pudding" model of the atom

Multiple Choice

What are electrons?

• an atom’s central regions, which is made up of protons and neutrons

• subatomic particles that have negative charges

• subatomic particles that have neutral charges

• subatomic particles that have positive charges

Multiple Choice

What experiment did J.J. Thomson run to develop his model of the atom?

• Gold-Foil Experiment

• Definite Proportion Experiment

• Cathode-Ray Tube Experiment

• No experimentation was done

Multiple Choice

This is an example of which model of the atom?

• Rutherford's Model

• Plum Pudding Model

• Atomic Model

• Bohr's Model

Multiple Choice

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

Multiple Choice

How many protons are in this element?

• 79
• 196
• 117
• Cannot be determined

Multiple Choice

This model was developed after J.J. Thompson discovered electrons, a particle smaller than an atom. Is shows electrons floating freely in a positive space.

• The "Plum Pudding Model" of the atom
• The "Rutherford Model" of the atom
• Democritus's model of the atom
• The "Quantum Mechanical Model" of the atom

Multiple Choice

JJ Thomson's experiment that he used to discover electrons

• gold foil experiment

• cathode ray experiment

• neither of these is correct

Multiple Choice

In the gold foil experiment, most of the positively charged alpha particles passed through the gold foil, but some were deflected or bounced back.  What did we conclude because of this?  

• Atoms are small indivisible spheres
• Atoms are mostly empty space with a small, dense, positive center
• Atoms have negatively charged particles which orbit the nucleus
• Light is a wave, not a particle

Multiple Choice

Rutherford's experiment that he used to discover protons and the nucleus.

• gold foil experiment

• cathode ray experiment

• neither of these is correct

Multiple Choice

The Rutherford experiment concluded that

• All alpha particles fired through the gold foil

• The electron cloud is large and positively charged

• An atom barely has any empty spaces

• The nucleus is tiny and heavy compared to the rest of an atom

Multiple Choice

Rutherford referred to the center of the atom, where the mass was concentrated, as _____

• the kernel
• the nucleus
• the focus
• the heart

Multiple Choice

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

Multiple Choice

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

Multiple Choice

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

Multiple Choice

Rutherford's gold foil experiment provided evidence that...

• negative and positive charges are spread evenly throughout the atom.
• alpha particles have a positive charge.
• gold is not a dense as previously thought.
• there is a dense positively charged nucleus at the center of an atom.

Multiple Choice

Which of the following is/are conclusions based on Rutherford’s gold foil experiment?

• Atom is mostly empty space

• The nucleus is positively charged

• The atom has a small dense nucleus

• All answers are correct

Multiple Choice

Which of the following is the best evidence that the particles that make up a cathode ray had a negative charge?

• The particles were produced by many different metals.

• The ray was deflected toward a positive electric field.

• Line emission spectra for an element are always the same.

• The ray caused a phosphorescent screen to glow.