Are We Alone?
What is an atom?
One single piece of an element.
WHat is conductivity?
The ability of a substance to transfer electric current from one molecule to the next.
Explain surface tension.
The ability of a substance to hold together.
Name 1 property of water
Store energy
What are valence electrons?
Electrons located in the outermost shell of an atom.
What are molecules?
A substance made of multiple elements.
What is cohesion?
Property of like molecules to stick together.
Which has the highest level of surface tension? Water, Oil, or Acetone?
Water
Name 1 property of water.
Good at dissolving things
Explain the Lewis Dot Structure
Simplified representation of the valence shell electrons in a molecule.
What are elements?
A substance made of one kind of atom.
Define solubility
The ability of a substance in solid form to dissolve in a liquid.
What type of charge does an electron have?
Negative
Name 1 property of water.
What are energy levels?
Fixed distances from the nucleus of an atom where electrons may be found.
Define Molecular Spectroscopy.
The study of absorptions of light by molecules.
What are compounds?
A substance made of two or more different chemical elements combined in a fixed ratio.
WHat happens to like charges?
They repel
Name 1 property of water.
Molecules stick together.
What does the Bohr Model show us?
Electron distances from the nucleus of an atom .
Define Macromolecules.
A molecule containing a very large number of atoms.
What is the Goldilocks Zone?
The habitable zone
What happens to different charges?
They attract.
Do salts easily dissolve in water?
Yes
What are salts composed of?
A metal and a nonmetal.