MCDB 6 Midterm 1 QUESTIONS AND ANSWERS 100 VERIFIED A GUARANTEED
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Course
NU1426
Institution
NU1426
MCDB 6 Midterm 1 QUESTIONS AND ANSWERS 100% VERIFIED A+ GUARANTEED
Smallest to Largest
Four Big Elements
H, C, O, N make what kind of bonds?
Atomic Number
Mass Number
Atoms with completed valance shells are...
Valence electrons...
Covalent Bonds
Non polar covalent bonds
Polar covalent bon...
Ans: sharing a pair of valence electrons
H2, O2, H2O, CH4
some of the strongest bonds
establish the basic structure of macromolecules
9). Non polar covalent bonds
Ans: atoms share electrons equally
10). Polar covalent bonds
Ans: one atom is more electronegative, do not share electrons equally
11). Ionic bonds
Ans: atoms sometimes strip electrons from their bonding partners
after the transfer, both atoms have chargers and are called ions
12). What are the weak chemical bonds?
Ans: ionic bonds, hydrogen bonds, van der waals interactions
these determine the precise folding pattern
13). Hydrogen bonds
Ans: forms when hydrogen atom is covalently bonded to one electronegative atom
14). Van de waals
Ans: electron may be distributed asymmetrically in molecules or atoms
occurs only when molecules or atoms are very close
pretty weak, only strong when there are mannnyyy interactions
15). What does the molecular shape reveal?
Ans: its function
16). Is water polar or non polar?
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, Ans: polar (and held together by hydrogen bonding)
17). 4 properties of water
Ans: 1. cohesive behavior
2. moderate temperature
3. expansion upon freezing
4. versatility as a solvent
18). What would happen if we tried to dissolve non-polar compounds in h2o, such as oil?
Ans: they'll form two separate layers because it would be hydrophobic
19). What do all organic compounds include?
Ans: carbon
20). Four ways carbon skeleton can vary
Ans: 1. length
2. branching
3. double bond position
4. presence of rings
21). Isomer
Ans: same number of atoms, different structure (properties)
22). Structural isomers
Ans: differ in the covalent arrangements of their atoms
ex: both compounds can be C5H12 but have different structures
23). Cis-trans isomer
Ans: differ in their spatial arrangements due to the inflexibility of double bonds
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