Chem 1010 - Chapter 6 with complete verified solutions(GUARANTEED SUCCESS).
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Course
Chem 1010
Institution
Chem 1010
Which of the following compounds has polar covalent bonds? (H2O, CsF2, S8, Ne)
H20
How many valence electrons does bromine (Br, atomic no. = 35) have?
7
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Which should be larger, the potassium atom, K, or the potassium ion, K⁺?
The potassium atom, K, with a...
Chem 1010 - Chapter 6 with
complete verified
solutions(GUARANTEED SUCCESS)
Which of the following compounds has polar covalent bonds? (H2O, CsF2,
S8, Ne) - answer H20
How many valence electrons does bromine (Br, atomic no. = 35) have? -
answer 7
Which should be larger, the potassium atom, K, or the potassium ion, K⁺? -
answer The potassium atom, K, with an additional shell of electrons is
larger.
Which of the following elements will most likely not form an ion at all?
(Na, O , Ar, Mg) - answer Ar
Which covalent bond is more polar: a sulfur-bromine (S-Br) bond or a
selenium-chlorine (Se-Cl) bond? - answer A selenium-chlorine bond should
be more polar because of a greater difference in effective nuclear charge.
Atoms of nonmetallic elements form covalent bonds, but they can also
form ionic bonds. How is this possible? - answer An ionic bond results
when a nonmetallic elements gains electrons to form an ion.
Which of the following compounds would be ionic? (CS2, CF4, SO2, CaCl2,
SF5) - answer CaCl2
Take enough money away from your bank account and the bank will show
a negative credit. Take an electron away from an atom, however, and the
atom shows up positive. Explain. - answer Neutral atoms contain
identically charged but oppositely signed protons and electrons. Removing
one of the negative electrons results in an excess of positively charged
protons.
, When is the electronic geometry of a molecule not the same as its
molecular shape? - answer when one or more of the substituents is a lone
pair of electrons
An individual carbon-oxygen bond is polar. Yet carbon dioxide is nonpolar
because ________. - answer (A) the molecule has an even number of
electrons
(B) it's symmetry
(C) the electron-pulls of the two oxygen atoms are equal and opposite
*B and C*
Which of the following molecules is the most polar? (HF, HCl, CO) - answer
HF
The number of nonbonding (lone) electron pairs in the water molecule is
________. - answer 2
Phosphine is a covalent compound that contains phosphorus, P, and
hydrogen, H. What is its chemical formula? - answer PH3
Which of the following has the greatest number of nonbonding pairs of
electrons? (C, H, He, F) - answer F
Classify the following bonds as ionic, covalent, or neither - O with F; Ca
with Cl; Na with Na - answer covalent, ionic, neither
If the concentration of gold in seawater is 2.0 milligram per ton of sea
water and the mass of the ocean is 1.5 × 1018 tons, how much gold is in
the ocean? - answer 3.0 × 1012 kg
Which of the following elements has six valence electrons? (Be, B, C, O) -
answer O
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