Atomic Models

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons
• Protons only
• Protons and Electrons
• Protons and Neutrons

Tags

NGSS.MS-PS1-1

Which of the following particles are NOT located in the nucleus?

• Quarks

• Protons

• Neutrons

• Electrons

Which of the following models describes best our modern day view of the atom?

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Tags

NGSS.MS-PS1-1

How did each model of the atom help to develop the atomic theory? 

• Each model provided opinions that were added.
• Each model showed different properties of the same structure. 
• Each model showed new particles that had been discovered.
• Each model built upon the other to show new particles or properties of previously discovered particles. 

Tags

NGSS.MS-PS1-5

Thomson believed the atom was a smooth, hard marble with a positive charge. And trapped within this marble were negatively charged particles. Which picture below matches this?

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Tags

NGSS.MS-PS1-1

all matter is made of what 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

What was wrong with Bohr's model of the atom?

• He said the atom had a dense, positive center.

• He said the atom was made of positive matter surrounding negative particles.

• He said atoms cannot be subdivided, created or destroyed.

• He said electrons follow specific paths, and you can tell where the electrons are

Which statement explains why most of the mass of an atom is contained in the relatively small nucleus?

• Atoms are composed of less dense sub-units than the nucleus

• The nucleus is located at the center of an atom

• Protons and neutrons have more mass than electrons

• Atoms are composed of mostly empty space

Which model of the atom does the picture represent

• Dalton's atomic model

• Rutherford's nuclear model

• Thomson's "plum pudding" model

• The electron cloud model

Tags

NGSS.MS-PS1-1

Why was the model changed to the "Electron Cloud" model?

• The electron orbits the nucleus like planets do

• The electron moves randomly in the atom and we do not know where it is

• The electron has a fixed path around the nucleus

• The electron is in energy shells around the nucleus