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chrissycherry
04.02.2020 •
Chemistry
7questions
question 21. correctly order the steps of drawing a covalent structure
a. draw the bonding electrons between atoms.
b. distribute remaining electrons in non-bonded pairs.
c. count the number of bonded electrons and subtract from total.
d. count the total valence electrons
e. check the octet rule for all atoms in the molecule.
f. draw the skeleton structure
question 2.
which type of bond is a result of the sharing of electrons between two more atoms?
a. metallic
b. crystal
c. covalent
d. ionic
question 3.
which of the following would form an ionic bond? select all that apply
-fluorine and fluorine
-hydrogen and chlorine
-calcium and iodine
-magnesium and oxygen
question 4.
compare and contrast sigma and pi bonds, including their shape and properties.
question 5.
which of the following interparticle forces is the weakest?
a. hydrogen bonding
b. ion-ion
c. london dispersion
d. dipole
question 6.
which of the following bonds could be characterized as polar covalent?
a. hydrogen-oxygen
b. nitrogen-nitrogen
c. chlorine-chlorine
d. oxygen-oxygen
question 7. covalent bonds, when they are compared to ionic compounds, have the following relationship:
a. are better conductors if heat and electricity
b. have lower melting points and boiling points
c. have higher melting points and boiling points
d. have a crystal structure and a formula unit
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Ответ:
Explanation:
The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles