MASTERING
BIOLOGY
CHAPTER 2
QUESTIONS
A substance that cannot be broken down into other substances by ordinary chemical
procedures is a(n) _____. - Answers -element
Proton - Answers -+1 charge
symbol p
Neutron - Answers -0 charge
symbol n
Electron - Answers --1 charge
symbol e
Mass of ~1amu - Answers -proton
neutron
mass of ~1/2000 amu - Answers -electron
What is the mass number of an ion with 104 electrons, 158 neutrons, and a +1 charge?
- Answers -263
The innermost electron shell of an atom can hold up to _____ electrons. - Answers -2
Which of these relationships is true of an uncharged atom? - Answers -The number of
protons is equal to the number of electrons.
What determines the types of chemical reactions that an atom participates in? -
Answers -the number of electrons in the outermost electron shell
BIOLOGY
CHAPTER 2
QUESTIONS
A substance that cannot be broken down into other substances by ordinary chemical
procedures is a(n) _____. - Answers -element
Proton - Answers -+1 charge
symbol p
Neutron - Answers -0 charge
symbol n
Electron - Answers --1 charge
symbol e
Mass of ~1amu - Answers -proton
neutron
mass of ~1/2000 amu - Answers -electron
What is the mass number of an ion with 104 electrons, 158 neutrons, and a +1 charge?
- Answers -263
The innermost electron shell of an atom can hold up to _____ electrons. - Answers -2
Which of these relationships is true of an uncharged atom? - Answers -The number of
protons is equal to the number of electrons.
What determines the types of chemical reactions that an atom participates in? -
Answers -the number of electrons in the outermost electron shell
