Chap 2 -2 Flashcards
What are electron mixture/solutions?
atoms w/in substances intermingle but don’t bond
<p>What are covalent bonds?
</p>
atoms share a pair(s) of electrons to fill outermost shell
What is the most stable bond?
Covalent<
Non polar bonds have?
equal sharing
Polar bonds have?
unequal sharing
What are there polar bonds?
electronegativity= certain types of atoms have greater pull on nucleus than other atoms
Covalent bonds have what shape?
molecular due to bond angles/geometry
What happens in ionic bonds?
atoms transfer electrons which changes proton electron ratios
- atoms become charged ions
What happens in hydrogen bonds?
attractive force between polar molecules
results in weak bonds
Water is __ % of your body weight
66
What are water’s properties?
olarity
temperature stabilization
cohesion
good solvent
Water is a ?
polar covalent molecule
What is evaporative cooling?
H- bonds break releasing water molecules
How is water a good solvent?
dissociates ions and polar molecules (puts them into solution/mixture)
Forms hydration spheres/shells
Hydrophobic substances are?
nonpolar and repel water
