Topic 1 - Atomic Structure and The Periodic Table Flashcards
what is in the centre of an atom
necleus
where are the electrons in an atom found
arranged in electron shells that surround the nucleus
where are protons and neutrons found
in the nucleus
what charge is protons
+1
what charge is neutrons
0
what charge is electrons
-1
what is the overall charge of an atom
no overall charge because the electrons and protons cancel each other out
atomic number
number of protons in the atom
mass number
total number of protons and neutrons
isotope
atoms of the same element but have different mass - they have the same atomic number but they have different masses/different number of neutrons
relative mass of an isotope
the isotopes mass numbers
relative atomic mass (RAM)
the mean mass of an atom of an element
RAM of an isotope calculation
RAM = (%isotope x mass of isotope) + (%isotope x mass of isotope)
100
on an atom which is on the top answer which is on the bottom (atomic number and mass number)
atomic mass number is on top
atomic number is on the bottom
how are the elements arranged in the modern periodic table
in order of increasing atomic number
