The structure of the atom + Isotopes Flashcards
What type of particle is every element made of?
atom
Be able to name the three sub-atomic particles
protons,electrons,neutrons
What is at the centre of every atom? What types of sub-atomic particle does it contain?
nucleus= contains protons and neutrons
Where are the electrons located in an atom?
energy levels surrounding the nucleus
What are the charges on each of the sub-atomic particles?
protons= +1 Electrons= -1 neutrons=0
Why are atoms neutral?
if they have an equal number of protons and electrons
What mass do each of the subatomic particles have?
protons= 1 electrons=0 neutrons=1
What is used to put the elements in order in the periodic table?
atomic number
What is the atomic number?
the number of protons
What is the mass number?
the number of protons and neutrons
How can the number of neutrons in an atom be calculated?
mass number- atomic number
What are isotopes?
elements with the same atomic number but different mass numbers
. What is the relative atomic mass of an element?
an average mass of an atom and the abundance of each isotope
