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

1/28

Click to flip

28 Cards in this Set

  • Front
  • Back
The smallest unit of an element that retains the chemical properties of that element.
Atom
The dense, positively charged structure found in the center of the atom.
Nucleus
What subatomic particles are found in the nucleus of an atom?
Protons & Neutrons
Where are electrons located in an atom?
The electron cloud
A subatomic particle with a positive charge, found in the nucleus of atoms.
Protons
A subatomic particle with a negative charge
Electron
A subatomic particle that does not have a charge, found in the nucleus of atoms
Neutron
The number of protons in the nucleus of an atom of an element.
Atomic Number
Where is the atomic number located on the periodic table?
Above the element's symbol.
What makes up most of the mass of the atom?
The nucleus (protons and neutrons)
What makes up most of the volume of an atom?
The electron cloud.
How do you calculate the number of nuetrons in an atom?
Neutrons = Atomic mass - protons
How do you calculate the atomic mass of an atom?
Atomic Mass = protons + neutrons
Atoms of the same element that have different numbers of neutrons.
Isotopes
In a neutral atom the number of electrons is equal to?
The number of protons.
The weighted average of the masses of the isotopes in a sample of an element.
Average Atomic Mass
(found under the element's symbol on the periodic table)
What is the difference between Carbon-12 and Carbon 14?
Different number of neutrons. They are isotopes.
The radioactive or unstable elements on the periodic table have a an atomic number greater than?
84 (bismuth)
Any isotope that has an unstable nucleus and decays over time
Radioactive Isotope
A process that involves changes to the nucleus of an atom.
Nuclear Reaction
The joining of two nuclei to form a larger nucleus accompanied by a release of energy.
Fusion
The splitting apart of an atomic nucleus into two smaller nuclei accompanied by a release of energy.
Fission
Alpha Particle
Beta Particle
A nuclear reaction in which an atom emits an alpha particle.
Alpha Decay
A nuclear reaction in which a neutron changes into a proton, and the atom emits a beta particle.
Beta Decay
What happens to the atomic number and mass number of an atom that ungergoes alpha decay?
Its atomic number decreases by 2, and its mass number decreases by 4.
What happens to the atomic number and mass number of an atom that undergoes beta decay?
The atomic number increases by 1and the mass number does not change.