Why are electrons not considered in determining the mass of an atom? Select ALL that apply.

Electrons have a mass of almost 0 amu.

It would take 1,800 electrons to equal the mass of one proton.

The mass of an electron is so small that it can be ignored.

The mass of electrons is considered when determining the mass of an atom.

What is the significance of protons in the atom?

Gives the atom its identity as an element

Determines an atom's chemical properties

What is the significance of neutrons in the atom?

Gives the atom its identity as an element

Determines an atom's chemical properties

What is the significance of electrons in the atom?

Determines an atom's chemical properties

Gives the atom its identity as an element

How can you use the Periodic Table to determine the number of proton's in an atom's nucleus?

The element’s atomic number is equal to the number of protons in its nucleus.

The element’s atomic mass is equal to the number of protons in its nucleus.

The period the element is located in is equal to the number of protons in its nucleus.

The group the element is located in is equal to the number of protons in its nucleus.

How can you use the Periodic Table to determine the number of electron clouds (energy levels) occupied by the atom's electrons?

The period the element is located in is equal to the number of electron clouds (energy levels) occupied by the atom's electrons.

The element’s atomic number is equal to the number of electron clouds (energy levels) occupied by the atom's electrons.

The element’s atomic mass is equal to the number of electron clouds (energy levels) occupied by the atom's electrons.

The group the element is located in is equal to the number of electron clouds (energy levels) occupied by the atom's electrons.

Atomic Theory and Atomic Structure: Unit Review

Authored by Samantha Pagliaro

Science

8th Grade

NGSS covered

Used 461+ times

Atomic Theory and Atomic Structure: Unit Review

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25 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who conducted the Gold Foil Experiment?

Dalton

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who conducted the Cathode-Ray Tube Experiment?

Dalton

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who determined that atoms consist of mostly empty space?

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

Chadwick

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who proposed that electrons move in different orbits, or energy levels, around the nucleus?

Dalton

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Who discovered that most atomic nuclei contain a third type of subatomic particle called a neutron?

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

Chadwick

Who proposed the Plum-Pudding model of the atom?

Thomson

Rutherford

Bohr

Schrodinger and Heisenberg

Chadwick

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which scientist proposed the atomic model depicted?

Dalton

Thomson

Rutherford

Bohr

Schrodinger/Heisenberg and Chadwick

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