Reading...
Play button
Play button
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;
10 Cards in this Set
- Front
- Back
|
Element
|
Substance that cannot be broken down to other substances by chemical reactions.
|
|
|
Compound
|
Substance consisting of two or more different elements combined in a fixed ration.
|
|
|
Atom
|
Smallest unit of matter that still retains the properties of an element.
|
|
|
Protons, neutrons, and electrons
|
Protons-positive, neutrons-neutral, electrons-negative.
|
|
|
Atomic nucleus
|
Dense core that is packed together tightly with protons and neutrons.
|
|
|
Dalton
|
Unit of measurement used to measure atoms and subatomic particles.
|
|
|
Atomic number
|
Number of protons an element possesses.
|
|
|
Mass number
|
The sum of protons plus neutrons in the nucleus of an atom.
|
|
|
Isotopes
|
Atoms that have more neutrons than other atoms of the same element and therefore have greater mass.
|
|
|
Radioactive isotopes
|
Isotope that has a spontaneously decaying nucleus, giving off particles and energy.
|
