Basic Chemistry Flashcards
What is matter?
any physical substance that takes up space and has mass.
What are atoms made up of?
Protons, neutrons, and electrons
Protons
positively charged, weigh 1amu, located in nucleus
neutrons
have no charge, weigh 1 amu, located in the nucleus
Electrons
negatively charged, weigh .00055amu, located outside of nucleus
What role do electrons play?
Chemical bonding
Can elements be broken down?
no
What does a molecule consist of?
2 or more atoms
What makes up most of the size of an atom?
Electrons
single bonds
need two electrons
double bonds
need 4 electrons
triple bonds
need 6 electrons
atomic mass consists of the addition of
protons and neutrons
atomic number tells you the amount of
protons, neutrons, and electrons
Ionic Bonding
one atom gives up one or more of its valence electrons, typically between metal and nonmetal