Chapter 3 Test Review

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. 

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NGSS.MS-PS1-1

What is the name of the experiment that led to the discovery of the electron?

• Cathode Ray Tube (CRT) Experiment 
• Gold Foil Experiment
• x-ray tube experiments
• mass spectroscopy

The law of _____ states that mass is neither created nor destroyed during chemical reactions or physical changes.

• multiple proportions

• definite proportions

• universal gravitation

• conservation of mass

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NGSS.MS-PS1-5

What law states that, regardless of the amount, a compound is always composed of the same elements in the same proportion by mass?

• Law of definite proportions

• Law of conservation of mass

• Law of multiple proportions

• Law of mass action

In oxides of nitrogen, atoms combine in small whole number ratios. This evidence supports the law of

• mass action

• conservation of mass

• definite proportions

• multiple proportions

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NGSS.MS-PS1-1

The smallest particle of an element that still retains all the properties of that element. 

• atom
• cathode ray
• electron
• compound

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NGSS.MS-PS1-1

The center of an atom.

• energy level

• ring

• nucleus

• electron cloud

Particles found in the nucleus of an atom that have no charge

• protons

• quarks

• electrrons

• neutrons

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NGSS.HS-PS1-8

Negatively charged particles located in the electron cloud of an atom

• protons

• quarks

• electrons

• neutrons

Positively charged particles located in the nucleus of an atom

• protons

• quarks

• electrrons

• neutrons

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NGSS.HS-PS1-8