Biology 1201 Exam 1 Test Bank | Complete Questions
with Correct Answers | Latest 2026 Update
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25
elements make up approximately 96% of living matter? - CORRECT ANSWER -Carbon, Hydrogen,
Nitrogen, Oxygen
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? -
CORRECT ANSWER -6
Which of these refers to atoms with the same atomic number but different atomic masses? -
CORRECT ANSWER -Isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine
have? - CORRECT 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? - CORRECT ANSWER -5
Atoms with the same number of protons but with different electrical charges _____. - CORRECT
ANSWER -Are different ions
In salt, what is the nature of the bond between sodium and chlorine? - CORRECT 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 - CORRECT ANSWER
-a positively charged sodium ion and a negatively charged chlorine ion
, An ionic bond involves _____. - CORRECT ANSWER -an attraction between ions of opposite
charge
What type of bond is joining the two hydrogen atoms? - CORRECT ANSWER -Covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - CORRECT ANSWER -
molecule
This atom can form up to _____ single covalent bond(s).
Atom with 4 valence electrons - CORRECT ANSWER -4
A(n) _____ bond joins these two oxygen atoms. - CORRECT ANSWER -A double covalent bond
The brackets are indicating a(n) _____ bond. - CORRECT ANSWER -hydrogen bond
What name is given to the bond between water molecules? - CORRECT ANSWER -hydrogen
Which of these figures correctly illustrates the nature of the bonding of H2O? - CORRECT
ANSWER -
What type of bond joins the carbon atom to each of the hydrogen atoms? - CORRECT ANSWER -
Single (nonpolar) covalent
A substance that cannot be broken down into other substances by ordinary chemical
procedures is a(n) _____. - CORRECT ANSWER -element
Which of the following subatomic particles always has a positive charge? - CORRECT ANSWER -
proton
with Correct Answers | Latest 2026 Update
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25
elements make up approximately 96% of living matter? - CORRECT ANSWER -Carbon, Hydrogen,
Nitrogen, Oxygen
What is the atomic number of an atom that has 6 protons, 6 neutrons, and 6 electrons? -
CORRECT ANSWER -6
Which of these refers to atoms with the same atomic number but different atomic masses? -
CORRECT ANSWER -Isotopes
Fluorine's atomic number is 9 and its atomic mass is 19. How many neutrons does fluorine
have? - CORRECT 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? - CORRECT ANSWER -5
Atoms with the same number of protons but with different electrical charges _____. - CORRECT
ANSWER -Are different ions
In salt, what is the nature of the bond between sodium and chlorine? - CORRECT 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 - CORRECT ANSWER
-a positively charged sodium ion and a negatively charged chlorine ion
, An ionic bond involves _____. - CORRECT ANSWER -an attraction between ions of opposite
charge
What type of bond is joining the two hydrogen atoms? - CORRECT ANSWER -Covalent
A(n) _____ refers to two or more atoms held together by covalent bonds. - CORRECT ANSWER -
molecule
This atom can form up to _____ single covalent bond(s).
Atom with 4 valence electrons - CORRECT ANSWER -4
A(n) _____ bond joins these two oxygen atoms. - CORRECT ANSWER -A double covalent bond
The brackets are indicating a(n) _____ bond. - CORRECT ANSWER -hydrogen bond
What name is given to the bond between water molecules? - CORRECT ANSWER -hydrogen
Which of these figures correctly illustrates the nature of the bonding of H2O? - CORRECT
ANSWER -
What type of bond joins the carbon atom to each of the hydrogen atoms? - CORRECT ANSWER -
Single (nonpolar) covalent
A substance that cannot be broken down into other substances by ordinary chemical
procedures is a(n) _____. - CORRECT ANSWER -element
Which of the following subatomic particles always has a positive charge? - CORRECT ANSWER -
proton
