ACS CHEMISTRY 131 FINAL EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
Atomic Structures - Correct Answers -Know all the problems except #7,14,15
When looking at the atomic structure what does the left-hand subscript represent -
Correct Answers -Left hand subscript = atomic number
When looking at the atomic structure what does the left-hand superscript represent -
Correct Answers -The mass number
Where on the atomic structure would we find the ionic change (if the isotope has one) -
Correct Answers -On the right hand super-script
The mass number = a combination of what two things - Correct Answers -Mass number
is the sum of all the number of protons and neutrons
The atomic number equals what? - Correct Answers -The atomic number = the number
of protons
- Found on left side subscript
What significant information came from the Millikan experiment about atomic structures
- Correct Answers -It determined the magnitude of the charge on an electron
What is the rule for electron configurations for elements in group 17 - Correct Answers -
They want to reach the noble gas thing so they give up a p orbital to fill the next s orbital
*** What species has this ground-state electron arrangement? 1s²2s²2p ⁶3s²3p ⁶3d¹ ⁰ -
Correct Answers -Zn⁺² **but why??**
If there is no charge on the isotope what can we assume about its # of electrons -
Correct Answers -We can assume that its number of electrons is equal to its number of
protons
What is the definition of an isotope - Correct Answers -Isotopes are forms of the same
element that differ only in their number of neutrons in the nuclei
- Atomic models will be the same with same subscripts on the left but different
superscripts on the left
QUESTIONS WITH COMPLETE
SOLUTIONS
Atomic Structures - Correct Answers -Know all the problems except #7,14,15
When looking at the atomic structure what does the left-hand subscript represent -
Correct Answers -Left hand subscript = atomic number
When looking at the atomic structure what does the left-hand superscript represent -
Correct Answers -The mass number
Where on the atomic structure would we find the ionic change (if the isotope has one) -
Correct Answers -On the right hand super-script
The mass number = a combination of what two things - Correct Answers -Mass number
is the sum of all the number of protons and neutrons
The atomic number equals what? - Correct Answers -The atomic number = the number
of protons
- Found on left side subscript
What significant information came from the Millikan experiment about atomic structures
- Correct Answers -It determined the magnitude of the charge on an electron
What is the rule for electron configurations for elements in group 17 - Correct Answers -
They want to reach the noble gas thing so they give up a p orbital to fill the next s orbital
*** What species has this ground-state electron arrangement? 1s²2s²2p ⁶3s²3p ⁶3d¹ ⁰ -
Correct Answers -Zn⁺² **but why??**
If there is no charge on the isotope what can we assume about its # of electrons -
Correct Answers -We can assume that its number of electrons is equal to its number of
protons
What is the definition of an isotope - Correct Answers -Isotopes are forms of the same
element that differ only in their number of neutrons in the nuclei
- Atomic models will be the same with same subscripts on the left but different
superscripts on the left
