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

1/15

Click to flip

15 Cards in this Set

  • Front
  • Back
Daltons Atomic Theory
the atom is the basic unit from which matter is constructed
subatomic particles
parts of the atom-protons, neutrons, and electrons
Atoms
Protons and nuetrons form the compact core of the atom called the nucleus, while electrons are dispersed in clouds around the nucleus. Atoms are mostly empty space.
Characteristics of subatomic particles
mass and charge
Atomic mass units (amu)
because the mass of a proton is so small it is measured in amu- protons and nuetrons each have a mass of 1 amu and the electron has a mass of 1/2000amu
Protons
Positive
Neutrons
Nuetral
Electrons
Negative
Element
descibes a substance that contains only one type of atom
atomic symbol
one or two letters to represent atom
Human Body Mass
mostly made of 64.6% oxygen (o), 18%carbon (c), 10%hydrogen (h), and 3.1% nitrogen (n)
Atomic number
is the number of protons in an atom's nulceus
mass number
the total number of protons and neutrons in the nulceus of an atom
isotopes
atoms of an element that have different numbers of nuetrons
Elements
elements in the same column belong in the same group