JMU BIO 140 CORE MAIN EXAMINATION ALL
QUESTIONS AND ANSWERS SURE A+
✔✔Define ecology - ✔✔the study of how organisms interact with one another and with
their physical environment in nature
✔✔Elements are made up of _______ type(s) of atom(s) - ✔✔one
✔✔Atoms are made up of what? - ✔✔-protons
-neutrons
-electron
✔✔Atoms' nucleus is made of what? - ✔✔protons and neutrons
✔✔What is the charge of protons? - ✔✔positive
✔✔What is the charge of a neutron? - ✔✔neutral
✔✔What is the charge of a electron? - ✔✔negative
✔✔What is an ion? - ✔✔A charged atom
, ✔✔Loss of an electron is a - ✔✔cation
✔✔Gain of an electron is a - ✔✔anion
✔✔If you lose an electron the atom becomes - ✔✔positive
✔✔If you gain an electron the atom becomes - ✔✔negative
✔✔Mass number - ✔✔protons + neutrons
✔✔The further the electrons are from the nucleus of an atom the _________ stable they
are - ✔✔less stable
✔✔Various energy levels are called - ✔✔shells
✔✔Shells contain - ✔✔orbitals
✔✔Tips for drawing a atom's electrons - ✔✔-must fill the first shell before beginning the
second
-each orbital gets one electron before they get two
✔✔The second shell of electrons can hold how many? - ✔✔8 electrons
✔✔Carbon has how many valence electrons? - ✔✔4
✔✔What is unique about the rows of the periodic table? - ✔✔they have the same
number of shells and orbitals
✔✔What is unique about the columns of the periodic table? - ✔✔same number of
valence electrons
✔✔Atoms are most stable when what? - ✔✔when their shells are filled
✔✔Why is carbon so versatile? - ✔✔it can form 4 bonds
✔✔What are the two shapes carbon is usually found in? - ✔✔-tetrahedron
-pyramidal
-linear
✔✔Why could carbon form a linear bond? - ✔✔because three carbon could form double
bonds
✔✔Define isomer - ✔✔same atoms different arrangements
QUESTIONS AND ANSWERS SURE A+
✔✔Define ecology - ✔✔the study of how organisms interact with one another and with
their physical environment in nature
✔✔Elements are made up of _______ type(s) of atom(s) - ✔✔one
✔✔Atoms are made up of what? - ✔✔-protons
-neutrons
-electron
✔✔Atoms' nucleus is made of what? - ✔✔protons and neutrons
✔✔What is the charge of protons? - ✔✔positive
✔✔What is the charge of a neutron? - ✔✔neutral
✔✔What is the charge of a electron? - ✔✔negative
✔✔What is an ion? - ✔✔A charged atom
, ✔✔Loss of an electron is a - ✔✔cation
✔✔Gain of an electron is a - ✔✔anion
✔✔If you lose an electron the atom becomes - ✔✔positive
✔✔If you gain an electron the atom becomes - ✔✔negative
✔✔Mass number - ✔✔protons + neutrons
✔✔The further the electrons are from the nucleus of an atom the _________ stable they
are - ✔✔less stable
✔✔Various energy levels are called - ✔✔shells
✔✔Shells contain - ✔✔orbitals
✔✔Tips for drawing a atom's electrons - ✔✔-must fill the first shell before beginning the
second
-each orbital gets one electron before they get two
✔✔The second shell of electrons can hold how many? - ✔✔8 electrons
✔✔Carbon has how many valence electrons? - ✔✔4
✔✔What is unique about the rows of the periodic table? - ✔✔they have the same
number of shells and orbitals
✔✔What is unique about the columns of the periodic table? - ✔✔same number of
valence electrons
✔✔Atoms are most stable when what? - ✔✔when their shells are filled
✔✔Why is carbon so versatile? - ✔✔it can form 4 bonds
✔✔What are the two shapes carbon is usually found in? - ✔✔-tetrahedron
-pyramidal
-linear
✔✔Why could carbon form a linear bond? - ✔✔because three carbon could form double
bonds
✔✔Define isomer - ✔✔same atoms different arrangements
