BIOLOGY 1201 EXAM 1 2026 STUDY GUIDE
CORE TOPICS REVIEW SHEET
◉ What is the atomic number of an atom that has 6 protons, 6
neutrons, and 6 electrons?
Answer: 6
◉ Which of these refers to atoms with the same atomic number but
different atomic masses?
Answer: Isotopes
◉ Fluorine's atomic number is 9 and its atomic mass is 19. How
many neutrons does fluorine have?
Answer: 10
◉ An uncharged atom of boron has an atomic number of 5 and an
atomic mass of 11. How many protons does boron have?
Answer: 5
◉ Atoms with the same number of protons but with different
electrical charges _____.
Answer: Are different ions
,◉ In salt, what is the nature of the bond between sodium and
chlorine?
Answer: Ionic
◉ What is the result of the animated process?
A bond between Na and Cl form where one electron from Na
transfers to Cl
Answer: a positively charged sodium ion and a negatively charged
chlorine ion
◉ An ionic bond involves _____.
Answer: an attraction between ions of opposite charge
◉ What type of bond is joining the two hydrogen atoms?
Answer: Covalent
◉ A(n) _____ refers to two or more atoms held together by covalent
bonds.
Answer: molecule
◉ This atom can form up to _____ single covalent bond(s).
Atom with 4 valence electrons
, Answer: 4
◉ A(n) _____ bond joins these two oxygen atoms.
Answer: A double covalent bond
◉ The brackets are indicating a(n) _____ bond.
Answer: hydrogen bond
◉ What name is given to the bond between water molecules?
Answer: hydrogen
◉ Which of these figures correctly illustrates the nature of the
bonding of H2O?
Answer:
◉ What type of bond joins the carbon atom to each of the hydrogen
atoms?
Answer: Single (nonpolar) covalent
◉ A substance that cannot be broken down into other substances by
ordinary chemical procedures is a(n) _____.
Answer: element
CORE TOPICS REVIEW SHEET
◉ What is the atomic number of an atom that has 6 protons, 6
neutrons, and 6 electrons?
Answer: 6
◉ Which of these refers to atoms with the same atomic number but
different atomic masses?
Answer: Isotopes
◉ Fluorine's atomic number is 9 and its atomic mass is 19. How
many neutrons does fluorine have?
Answer: 10
◉ An uncharged atom of boron has an atomic number of 5 and an
atomic mass of 11. How many protons does boron have?
Answer: 5
◉ Atoms with the same number of protons but with different
electrical charges _____.
Answer: Are different ions
,◉ In salt, what is the nature of the bond between sodium and
chlorine?
Answer: Ionic
◉ What is the result of the animated process?
A bond between Na and Cl form where one electron from Na
transfers to Cl
Answer: a positively charged sodium ion and a negatively charged
chlorine ion
◉ An ionic bond involves _____.
Answer: an attraction between ions of opposite charge
◉ What type of bond is joining the two hydrogen atoms?
Answer: Covalent
◉ A(n) _____ refers to two or more atoms held together by covalent
bonds.
Answer: molecule
◉ This atom can form up to _____ single covalent bond(s).
Atom with 4 valence electrons
, Answer: 4
◉ A(n) _____ bond joins these two oxygen atoms.
Answer: A double covalent bond
◉ The brackets are indicating a(n) _____ bond.
Answer: hydrogen bond
◉ What name is given to the bond between water molecules?
Answer: hydrogen
◉ Which of these figures correctly illustrates the nature of the
bonding of H2O?
Answer:
◉ What type of bond joins the carbon atom to each of the hydrogen
atoms?
Answer: Single (nonpolar) covalent
◉ A substance that cannot be broken down into other substances by
ordinary chemical procedures is a(n) _____.
Answer: element
