Hello can someone please help with this please
Which one of the following substances should exhibit hydrogen bonding in the liquid state?
NH3
PH3
H2
H2S
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How do chemical bonds form between the atoms in an ionic ompound?
sharing of atomic orbitals
sharing of all electrons
transfer of electrons from one atom to the other
sharing of valence electrons
Which is least likely to form an ion?
Li
Ar
F
Mg
Ionic compounds are good conductors of electricity when molten or aqueous.
False
True
In ionic compounds, __________ lose their valence electrons to form positively charged __________
nonmetals; anions
metals; cations
metals; polyatomic ions
metals; anions
What is the symbol for the ion with 19 protons and 18 electrons?
K+
Ar
F-
F+
Transition metals form 2 or more positive ions.
True
False
No answer text provided.
Which of the following are properties of ionic compounds?
high boiling point
conductor of electricity
gas at room temperature
high metling point
You observe that a compound is hard and brittle, smells salty, dissolves in water, and conducts electricity. You conclude that the compound more likely is a(n)...
ionic compound
a sugar
SO2
covalent compound
Which two elements would NOT be capable of forming an ionic bond?
calcium and oxygen
barium and nitrogen
oxygen and chlorine
sodium and chlorine
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Melting points of ionic compounds tend to be _____.
very high
very low
slightly above room temperature
ower than those of molecular compounds
Will solid NaCl conduct electricity?
No
Yes
Double and triple bonds form because
the atoms involved have high electronegativities.
one of the atoms in the molecule has more than eight valence electrons.
there is at least one hydrogen atom involved in the bond.
single covalent bonds do not give all of the atoms in the molecule eight valence electrons.
A triple bond involves the sharing of ________ pairs of electron(s) between the atoms.
2
3
4
6
The sharing of 4 electrons between atoms forms a(n)...
unstable bond
triple bond
double bond
single bond
Which of the following molecules forms a double bond?
O2
Cl2
CH4
N2
Which property is most closely associated with covalent molecules?
It is composed of a metal and a nonmetal.
It has a very high melting point.
It is composed of a two metals.
It is a gas at room temperature.
Which of the following compounds contains only bonds in which electrons are shared?
CuNO3
LiOH
PCl3
BaS
Which factor distinguishes a metallic bond from an ionic bond or a covalent bond?
Unequal sharing of core electrons
Electron transfer from one atom to another
Equal sharing of electrons
Dissociation of valence electrons
Which of the following bonds is least polar?
C-F
B-F
N-F
O-F
