• 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

Card Range To Study

through

image

Play button

image

Play button

image

Progress

1/14

Click to flip

Use LEFT and RIGHT arrow keys to navigate between flashcards;

Use UP and DOWN arrow keys to flip the card;

H to show hint;

A reads text to speech;

14 Cards in this Set

  • Front
  • Back

Isotopes

Different # of neutrons, same # of protons in an element.




-Most elements have isotopes; very common


- Isotopes decay at different rates



# of Neutrons

Mass # - Atomic # = # of neutrons

Radioactive Decay

Unstable nucleus releases particles & energy & changes into new element.




- If # of protons change during radioactive decay, a new element is produced




- Only some elements are unstable




Uses:




- Medical imagery


-stopping cancer cells


-killing bacteria


-producing energy

Radioactive

an atom that undergoes radioactive decay

Radioactive Elements

Elements only having radioactive isotopes

Half -life

Time it takes for a sample of Radioactive isotope to decay to half it's original mass




-Useful for dating rocks/fossils

Synthetic Elements

(not found in nature) : made in a lab by crashing particles together in a particle accelerator

Physical Property

-Observed characteristics


-Does not change the identity of substance

Chemical Property

-Ability or inability of a substance to combine and change into 1 or more substance(s)

Chemical Change

-Is a change of 1 or more substances into another substance(s)

Molecule

a neutral particle that forms as a result of electron sharing




-2 or more atoms combined


-can be just one element or more than one element combined

Decomposition

when a compound "decomposes" into it's elements

Compound

contains more then one element

Synthesis

when a element combine to form compounds