UCF Biology 1 Yeargain Chapter 2
Study Questions with 100%
correct answers ( graded A+)
What are the four essential elements of Life? - answer Hydrogen,
Oxygen, Carbon, & Nitrogen
What is the mass number of an atom? - answer Protons +
neutrons
The number of ________ differs in isotopes - answer neutrons
An electron in which shell will have the highest potential energy? -
answer 3rd shell
How many electrons will you find in the 3rd shell of an Aluminum
(Al) atom (atomic # = 13) - answer 3
Draw the electron shell diagram for Phosphorous (atomic # = 15),
Identify the number of valence electrons, the valence number,
and the number of bonds it will form. - answer 5 valence
electrons, valence number = 3, will form 3 bonds. Shell 1 will be
full with 2 electrons, shell 2 will be full with 8 electrons, and the
third shell will have 5 electrons, three of those are unpaired.
Study Questions with 100%
correct answers ( graded A+)
What are the four essential elements of Life? - answer Hydrogen,
Oxygen, Carbon, & Nitrogen
What is the mass number of an atom? - answer Protons +
neutrons
The number of ________ differs in isotopes - answer neutrons
An electron in which shell will have the highest potential energy? -
answer 3rd shell
How many electrons will you find in the 3rd shell of an Aluminum
(Al) atom (atomic # = 13) - answer 3
Draw the electron shell diagram for Phosphorous (atomic # = 15),
Identify the number of valence electrons, the valence number,
and the number of bonds it will form. - answer 5 valence
electrons, valence number = 3, will form 3 bonds. Shell 1 will be
full with 2 electrons, shell 2 will be full with 8 electrons, and the
third shell will have 5 electrons, three of those are unpaired.
