Solved by a verified expert:Basic Chemistry and Cells Quiz
2. What kind
of interaction is shown between sodium and chlorine?
a. The
chlorine atom gives up one neutron.
b. The
chlorine atom gives up one electron.
c. The
sodium atom gives up one proton.
d. The
sodium atom gives up one electron.
e. The
sodium atom gives up one neutron.
3. Out of
covalent, ionic, and hydrogen, the hydrogen bond is the strongest
a. True
b. False
A hydrogen bond is weaker than an ionic or covalent bond.
4. A chemist
found one atom with 9 protons, 8 neutrons and 7 electrons. Another atom has 8 protons, 9 neutrons and 10
electrons. Which of the following statements is correct?
a. Both
atoms have the same mass number.
b. Both
atoms have fulfilled the octet rule.
c. Both
atoms are isotopes of the same element.
d. Both
atoms have -2 electrical charge.
e. Both
atoms are chemically non-reactive and would not interact with other atoms.
5. This diagram shows that two oxygen atoms
interact
a. to form
hydrogen bonds.
b. to form
two covalent bonds.
c. to form
one covalent bond.
d. to form
four covalent bonds.
e. to form
an ionic bond.
A double covalent bond occurs when two atoms share two pairs
of electrons.
6. Which
term describes the tendency of water molecules to cling to other water
molecules?
a. nonpolar
b. adhesion
c. ccohesion
d. polar
e. electronegativity
Water molecules exhibit cohesion when they stick together.
7. From the
following, select all boxes that contain the term or symbol which corresponds
to one of the six types of atoms that are basic to life.
8. The
identity of any atom can be determined by the
a. atomic
charge.
b. atomic
mass.
c. number
of electrons.
d. number of
neutrons.
e. number of
protons.
9. The
atomic number is the number of protons in the nucleus of an atom, which
determines the identity of the atom.
a. Positive
protons and negative electrons in the nucleus are surrounded by neutral
neutrons.
b. Positive
protons and negative neutrons in the nucleus are surrounded by neutral
electrons.
c. Negative
protons and positive neutrons in the nucleus are surrounded by neutral
electrons.
d. Neutral
protons and negative neutrons in the nucleus are surrounded by positive
electrons.
e. Positive
protons and neutral neutrons in the nucleus are surrounded by negative
electrons.
10. When there
in an unequal sharing of electrons between two atoms, what will be the result?
a. a polar
molecule, such as water.
b. an ionic
compound, such as salt.
c. an
electronegative molecule, such as calcium ion.
d. a
hydrophobic molecule, such as fat.
e. a
nonpolar molecule, such as methane.
11. Drag the
appropriate descriptions of the subatomic particles into the following boxes.
12. This diagram shows an atom of
phosphorus. How many electrons are in
the valence shell?
a. 2
b. 4
c. 5
d. 6
e. 8
13. Which of
the following statements is not true about most other solvents, rather than
about water ice?
a. It is
less dense than liquid water
b. It
freezes from top to bottom
c. It
floats in water
d. It is
denser than liquid water
e. It
insulates and slows down the freezing of water below
14. Complete
the following statements about water acting as a hydrophilic solvent. Not all
choices will be used.
15. The
attraction of an atom for the electrons in a covalent bond is called
electronegativity.
a. True
b. False
16. Complete
the following statements using the pH scale provided when necessary.
17. A solution
which resists pH changes is
a. a
hydrophilic solution.
b. a buffer.
c. a
hydrophobic solution.
d. a base.
e. an acid.
18. A neutral
atom of phosphorus was found to have an atomic number of 15 and a mass number
of 31. What is the total number of
electrons in this atom?
a. 31
b. 8
c. 16
d. 15
e. 46
19. In a
solution, if the hydroxide ion concentration exceeds the hydrogen ion
concentration the solution is considered to be
a. a base.
b. a neutral
solution.
c. an acid.
d. a buffer.
e. a solute.
20. If a
neutral oxygen atom gains two electrons from another atom, then the overall
charge of this oxygen atom will become
a. 2 more
than its original mass number
b. +2
c. 0
d. -2
e. unknown,
as you need to know how many protons are present
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