Chapter 2: The Chemistry of Life

The space surrounding the nucleus of an atom contains: 

• Protons
• Electrons
• Ions
• Neutrons

The three particles that make up an atom are: 

• Positives, Negatives, and Electrons
• Protons, Neutrons, and Isotopes
• Protons and Electrons
• Protons, Neutrons, and Electrons

The nucleus of an atom is comprised of: 

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

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If an atom contains 9 protons, 12 neutrons, and 9 electrons: 

• 21
• 9
• 12
• 30

If an atom contains 13 protons and 14 neutrons, its atomic number is: 

• 1
• 14
• 27
• 13

Isotopes are atoms of the same elements with the same number of protons and ....

• a different number of electrons
• a different number of molecules
• a different number of neutrons
• the same number of neutrons

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Which of the following is a use of radioactive isotopes ?

• Can determine the ages of rocks and fossils
• Can be used to treat cancer and kill bacteria that causes food to spoil
• Used as "tracers" to follow the movements of substances within organisms
• All of the above

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NGSS.HS-PS1-8

What type of electron is available to form bonds ?

• Nucleus
• Ionic
• Covalent
• Valence

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What type of ion forms when an atom loses electrons ?

• Neutral
• Positive
• Negative
• Possibly Positive or Negative

A covalent bond is formed as a result of...

• transferring electrons
• sharing electrons
• transferring protons
• sharing protons