Structure Of An Atom Flashcards
What is an atom?
The smallest amount of matter which retains its identity as a chemical element
What is everything made up of?
Atoms
Name the sizes of things largest to smallest
Planet, island, human, organ, cell, dna, atom
What is a subatomic particle?
A particle that is smaller then an atom
What are the subatomic particles in an atom
Proton, neutron, electron
What is a neutron?
A subatomic particle that has no charge and is found in the nucleus
What is a proton?
A subatomic particle that has a positive charge and is found in the nucleus
What is an electron?
A subatomic particle that has a negative charge. It orbits the nucleus in orbitals in shells
What is the mass number?
Amount of protons + amount of neutrons
What is the atomic number?
Amount of protons
How do you find out the amount of neutrons?
Mass number - atomic number
What 2 subatomic particles are the same in a neutral atom?
Electrons and protons
What is the rule of how many electrons fit into the first 3 shells of an atom
2,8,8
What is an isotope?
Two or more forms of chemical elements that have the same amount of protons but different amount of neutrons
Describe a proton?
+1 charge, 1 relative mass (amu), location = nucleus
