Atoms Flashcards
Define a compound
A substance made from two or more types of atoms chemically bonded together
Define an element
A substance made from only one type of atom
Define a mixture
Groups of atoms, elements and compounds that are not chemically bonded together
What are the three subatomic particles found in an atom?
Protons, neutrons and electrons
What charge is an electron?
Negative
What charge is a proton?
Positive
What charge is a neutron?
Neutral
What subatomic particles are found in the nucleus?
Protons and neutrons
Where are the electrons found?
The shells
What is the mass of a proton and a neutron?
1
What is the mass of an electron?
1/1980 (almost 0)
How do you work out the number of protons and electrons?
The atomic number
How do you work out the number of neutrons?
Mass number - atomic number
