Atoms & Electrons
What tiny particles make up all matter?
Atoms
What bond happens when atoms share electrons evenly?
Nonpolar covalent
What's the formula for water?
H2O
What do we call water sticking to water?
Cohesion
What property of water lets bugs walk on water?
Surface tension
Which subatomic particle has a negative charge?
Electron
What bond happens when atoms share electrons unevenly?
Polar Covalent Bond
Which part of water is slightly negative?
Oxygen atom
What do we call water sticking to other things?
Adhesion
What property helps water move up a paper towel or plant stem?
adhesion + cohesion = capillary action
What do atoms "want" to have in their outer shell?
A full set of electrons
What bond happens when one atom gives an electron completely to another?
Ionic bond
Which part of water is slightly positive?
The hydrogen atoms
What property makes water resist quick temperature changes?
High heat capacity
What property keeps the ocean from heating or cooling too quickly?
High heat capacity
What's it called when atoms join together to a full outer shell?
Bonding
Which type of bond does water have between oxygen and hydrogen
Polar Covalent Bond
What weak attraction forms between the hydrogen of one water molecule and the oxygen of another?
A hydrogen bond
What property lets water cool us when we sweat?
High heat of vaporization
Why do your hands feel cold when pool water evaporates off them? (property of water)
High heat of vaporization (evaporation removes heat)
True or False: As you move further right on the periodic table, the number of electrons decreases.
False; it increases
Why does oxygen "hog" electrons in water?
It has a stronger pull (higher electronegativity)
Why do hydrogen bonds matter if they're weak?
They're stronger together --> gives water its special properties
What property explains why ice floats instead of sinking?
Density of ice: water expands when it freezes, making ice less dense
Why can fish stay alive in a frozen lake?
Ice floats and insulates liquid water below