BIO 250 FINAL EXAM 4 2026 MOCK EXAM PRACTICE SET WITH SOLUTIONS A+

BIO 250 FINAL EXAM 4 2026 MOCK EXAM
PRACTICE SET WITH SOLUTIONS A+

◉ Carbon:
Atomic number
atomic weight Answer: atomic number = 6
atomic weight = 12


- has 6 electrons and 6 protons and 6 neutrons


◉ Nitrogen:
atomic number
atomic weight Answer: atomic number = 7
atomic weight = 14


- has 7 electrons, 7 protons, and 7 neutrons


◉ oxygen:
atomic number
atomic weight Answer: atomic number = 8
atomic weight = 16

,has 8 protons, 8 neutrons, 8 electrons


◉ 96% of body weight is made up of Answer: Carbon, Hydrogen,
Oxygen, and Nitrogen


◉ ionic bonds Answer: result from the attraction between ions that
have opposite charges


(Na+ + Cl- = NaCl)


◉ Covalent bonds Answer: strong bonds which share pairs of
electrons
(represented by a straight line C-C, C=C)


◉ Oxygen :
Symbol
Atomic Number Answer: O
atomic number = 8


◉ Carbon:
Symbol

,Atomic number Answer: C
atomic number= 6


◉ Hydrogen:
Symbol
atomic number Answer: H
atomic number= 1


◉ Nitrogen:
symbol
atomic number Answer: N
Atomic number = 7


◉ Calcium:
Symbol Answer: Ca


◉ Phosphorous:
Symbol Answer: P


◉ Sulfur:
Symbol Answer: S

, ◉ Iron
Symbol Answer: Fe


◉ Potassium
Symbol Answer: K


◉ Sodium:
Symbol Answer: Na


◉ Magnesium
Symbol Answer: Mg


◉ Copper
Symbol Answer: Cu


◉ Iodine
Symbol Answer: I


◉ Fluorine
Symbol Answer: F


◉ Manganese