Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/21

Click to flip

21 Cards in this Set

  • Front
  • Back
Atoms
Units of matter cannot be broken down by chemical means
All substances in the world are called...
Matter
All Matter is comprised of..
elements
Elements are made up of...
Atoms
Atoms Contain...
Protons, neutrons, and electrons
Closest shell of an atom holds...
2 electrons, next shell holds up to 8, if more than 10 the atom has additional shells
Mass
The measure of how much matter is contained within an object
Mass of 1 proton
Mass of 1 neutron
Mass of 1 electron
1 amu
1 amu
0 amu
Atomic weight
protons + neutrons = atomic weight
Isotopes
Atoms that have the same number of protons but differ in the number of neutrons.
Radioisotopes
Unstable isotopes that emit forms of radiation.
Compound
The combination of 2 or more elements. Ex; sodium and chlorine = sodium chloride (plain table salt)
Molecule
Elements held together by chemical bonds
Covalent Bond
Forms when 2 or more atoms share the electrons in their outer shells.
Molecule
A chemical structure held together by covalent bonds. Ex; Carbon Dioxide, Hydrogen Dioxide
Ion
An atom or group of atoms that carries either a positive or negative electrical charge
Ionic Bond
Results from the mutual attraction of oppositely charged ions
How do atoms interact with one another
Interact w/each other so as to fill their outermost shell
Hydrogen Bonds
The attraction between a slightly positively charged hydrogen atom and a slightly negatively charged atom nearby.
4 important elements
Carbon, oxygen, hydrogen, nitrogen
3 important molecules
02 (oxygen gas), CO2 (carbon dioxide), H2O