Living By Chemistry 1st Semester Review

What is the definition of matter?

• The smallest particle in a substance

• Something that has mass and takes up space

• How much something weighs

• Something that only goes through a chemical change

What does an element's ATOMIC NUMBER represent?

• number of atoms in its nucleus

• number of protons in its nucleus

• number of neutrons in its nucleus

• number of neutrons plus protons in its nucleus

Particles in an atom that are negative 

• molecules 
• electrons 
• neutrons 
• protons 

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Particles in an atom that are neutral and have no charge are 

• negatrons 
• electrons 
• neutrons 
• protons 

The smallest particle of an element that retains the properties of that element is a(n)

• atom
• electron
• proton
• neutron

The sum of the protons and neutrons in an atom equals the

• atomic number
• nuclear number
• average atomic mass
• mass number

Isotopes of the same element have different

• number of neutrons 
• number of protons
• number of electrons
• atomic number 

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The central region of an atom where neutrons and protons are is the _________. 

• nucleus 
• electron cloud
• core 
• center 

What is the name of the piece of lab equipment in the illustration?

• watch glass

• graduated cylinder

• beaker

• Erlenmeyer flask

Which statement about the science of chemistry is correct?

• Chemistry is the study of living organisms and how they are classified.

• Chemistry is the study of matter and how matter can be changed.

• Chemistry is the study of different scientific hypotheses about movement.

• Chemistry is the explanation of the physical properties of a substance.

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