1
An atom has 11 protons and 10 electrons. What is it?
Cation.
What makes a covalent bond polar?
unequal electron sharing.
What determined an atom's chemical behavior?
It's outermost electrons.
Why do atoms form chemical bonds?
To achieve stability by filling outer shell
What type of bond involves electron transfer
ionic
NaCl forms when which atom gains an electron?
Chlorine.
Can a molecule be polar but have no net charge?
Yes. (ex. Water)
What part of water becomes partially negative?
oxygen.
polarity
Equal electron sharing produces what type of bond?
non-polar covalent.
if Na+ enters water, which part of the water faces it?
Oxygen
Cl- enters water, which part faces it?
Hydrogen
What happens to H+ concentration when water is added?
it increases.
What happens to pH when H+ increases?
It decreases.
what happens to pH when a base removes H+
it increases
Why is oil hydrophobic?
bonds are relatively nonpolar
what water property directly produces surface tension
Cohesion
What interaction allows water to absorb heat slowly
Hydrogen bonding.
Why is ice less dense than liquid water?
Hydrogen bonding creates a more open structure.
Which dissolves better in water? Polar or non-polar molecules?
polar molecules
what type of sharing creates ions
electron transfer
unequal sharing
High H+ concentration.
Low pH
Why can changing one bond change a molecule's function
it changes structure.
Polar bonds -> polarity -> ____ -> water properties.
hydrogen bonding.