Structure of an atom - Intro to Back to Basics (1.1) Flashcards
Define matter
Matter is a physical substance which occupies space and has mass
Define atom
The smallest particle, made up of protons, neutrons & electrons
Define molecule
Any two or more atoms joined together by any type of chemical bond
Define element
Substance made up of only one type of atom
normally exist as atoms or molecules
Define compound
Molecules that contain two or more different types of atoms chemically bonded together
Define mixture
Two or more atoms, ions, molecules or compounds that are mixed together but not chemically bonded
What is the relative charge of each of the sub-atomic particles of an atom?
Proton +1
Neutron 0
Electron -1
What is the relative mass of each of the sub-atomic particles of an atom?
Proton 1
Neutron 1
Electron very small
What is different about each element?
The number of protons in their nucleus
Define isotope
Atoms with the same number of protons, but a different number of neutrons
Atoms have the same number of protons and electrons. True or false?
True
How do you work out the number of neutrons in an atom/isotope?
Mass number - atomic number
What is the difference between relative atomic and molecular mass?
RAM - only one atom
Mr - calculated by adding together all of the atomic masses in the molecule