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Elements And Chemical Bonds (Pt.2)
Test Description: Elements and Chemical Bonds (Pt.2)
Instructions: Answer all questions to get your test result.
1) Which of the following could form a covalent bond with a single Fluorine (Group 17) atom that would form a stable compound.
A
1 Phosphorus (Group 15) atom
B
1 Hydrogen (Group 1) atom
C
1 Oxygen (Group 16) atom
D
1 Sodium (Group 1) atom
2) Covalent compounds are good conductors of electricity and thermal energy.
A
FALSE- They are made of metals and nonmetals and metals are bad conductors of electricity
B
TRUE- They are made of nonmetals, which are good conductors of electricity.
C
TRUE- They are made of metals and nonmetals and metals are good conductors of electricity.
D
FALSE- They are made of nonmetals, which are bad conductors of electricity.
3) A(n) ____________________ is a molecule that has a partial positive end and a partial negative because of an unequal sharing of the negative charges of shared electrons.
A
nonpolar compound
B
metal
C
polar compound
D
ionic compound
4) A molecule is _____________________ if the atoms pull equally on the negative charge of shared electrons.
A
polar
B
ionized
C
ionic
D
nonpolar
5) The Pauling Scale is used to show __________________________, which is the measure of the tendency of an atom to attract a bonding pair of electrons. This will vary from element to element.
A
nonpolarity
B
subscript
C
electronegativity
D
ionic tendency
6) Hydrochloric Acid (HCl) is a compound including 1 atom of Hydrogen (H) and 1 atom of Chlorine (Cl) joined in a single covalent bond. Hydrogen has an electronegativity of 2.1 and Chlorine has an elctronegativity of 3. Is this a polar compound?
A
YES - The Chlorine end would have a partial negative and the Hydrogen end a partial positive.
B
Not enough information to respond
C
NO- This is a nonpolar molecule
D
YES - The Chlorine end would have a partial positive and the Hydrogen end a partial negative.
7) Polar compounds cannot dissolve in other polar compounds, but can dissolve in nonpolar compounds.
A
TRUE
B
-
C
FALSE
D
-
8) A(n) _______________________ is a group of chemical symbols and numbers that represent the elements and the number of atoms of each element that make up a molecule or compound.
A
chemical bond
B
chemical formula
C
subscript
D
chemical configuration
9) The bonding of oppositely charged metal and nonmetal atoms will result in a(n) __________.
A
covalent molecule
B
polar covalent bond
C
metal
D
ionic compound
10) A(n) ___________ is an atom of an element that is no longer electrically neutral because it has gained or lost 1 or more valence electrons.
A
dipole
B
ion
C
isotope
D
nuclide
11) A neutral Sodium (Na) atom releases it's 1 valence electron to reveal a full shell of 8 underneath to stabilize. In the process the once neutral Sodium (Na) atom, becomes a(n) ______________.
A
Sodium isotope
B
Sodium cation
C
Beryllium atom
D
Sodium anion
12) If 1 atom of the group 2 metal Magnesium (Mg) was to form an ionic bond with 1 atom of the group 16 nonmetal Oxygen (O), what would most likely have to take place?
A
The Mg atom would transfer it's 2 valence electrons to the O atom.
B
Both of these would result in both elements becoming stable and oppositely charged.
C
The O atom would transfer it's 2 valence electrons to the Mg atom.
D
Neither of these would result in both elements becoming stable and oppositely charged.
13) Which of the following is NOT a characteristic of most ionic compounds?
A
Neither of these are characteristic of most ionic compounds
B
Solid and Brittle
C
High Melting/Boiling Points
D
Both of these are characteristic of most ionic compounds
14) Covalent compounds are made up of many molecules, but in an ionic compound there are no molecules.
A
-
B
-
C
FALSE
D
TRUE
15) A metallic bond is a bond that forms between metal cations that ______________.
A
bond with metal anions
B
transfer their valence electrons to the electron shells of one another
C
share their pooled valence electrons
D
share their valence electrons to complete each others outer shells.
16) Metals are __________.
A
malleable
B
shiny
C
All of these are properties of metals.
D
good conductors of electricity and thermal energy
17) Why are group 18 noble gases stable?
A
They all have full valence shells.
B
Noble gases do not have any isotopes.
C
They are all ions.
D
They are all naturally neutral elements.
18) How can one know that an electron configuration diagram of a Lithium (Li) atom would include 2 electron shells and 1 valence electron, if neutral?
A
Because it is a metalloid
B
Because it is a Period 1, Group 2 element
C
Because it is a Period 2, Group 1 element
D
Because it has only 2 isotopes
19) Metalloids have properties in common with metals and nonmetals and are often used as semi-conductors in electronic devices.
A
-
B
FALSE
C
-
D
TRUE
20) Neon (Ne) is a Group 18 noble gas. Which of the following would an atom of Neon be able to form a stable covalent bond with?
A
A group 2 element.
B
Noble gases don't form covalent bonds.
C
A group 10 element.
D
None of These
*select an answer for all questions
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