Atomic theory Flashcards
Can we transform atoms
No, we can only rearrange them
Can atoms age
No, but the things made from them do
How many elements are there
118, 90 being natural
Where does chemistry happen
From the atoms up
What is an atom
A small indivisible thing that makes everything
What is a proton
A positive particle that is in the nucleus of an atom
What is an electron
A negative particle that surrounds the nucleus of and atom
How do you find the mass number of an element
The number of protons plus the number of neutrons
What is a neutron
A particle that has no charge and is in the nucleus of an atom
What is a molecule
A collection of any atoms
What is an element
A collection of all the same atoms
What is a compound
Different atoms or molecules
How do you make an atom neutral
The same number of protons and electrons
What is an isotope
Modifications of an element that has the same atomic number but different mass number
What happens when atoms touch
When atoms touch they are chemically bonded together
