c1 atomic structure Flashcards
relative charge for protons electrons and neutrons
p=+1
e=-1
n=0
relative mass for protons neutrons and electrons?
p=1
n=1
electron=very small
how many electrons go on the first and second shell+
second shell+ is max (8)
first shell is max (2)
what type of ion does non metal elements form
negative
what type of ion does metal elements form
positive
what is an isotope
different forms of the same element’ which have the SAME no of PROTONS but DIFFERENT no of NEUTRONS
what are transition metals used for
catalysts
out of protons electrons and neutrons what 2 are the same when finding the number of these
protons and electric
why is aluminium in group 3
because it’s outer shell has 3 electrons
what are the properties of transition metals
- low reactivity / react slowly (with water or oxygen)
- used as catalysts
- ions with different charges
- coloured compounds STRONG AND HARD
- high melting points
- high densities
properties of group 1(alkali metals)
only forms 1+ white/colourless soft low melting points low density reactive especially (water)