atoms Flashcards
where are the electrons in an atom
goingg around the nucleus
what’s a protons relative charge
+1
what’s a electrons relative charge
-1
what’s a neutrons relative charge
no charge
what is an element
substance made from one type of atom
where are the metals on the periodic table
the left
where are the non mental a on the periodic table
the right
what are the letters on the periodic table
the elements chemical symbol
where are the transitional metals
the centre
if there are 10 electrons in an atom- how many protons?
10
always the same about of protons and electrons
balanced- no overall electrical charge
what is a compound
different types of atoms joined together.
chemical bonds hold them together
what does the nucleus contain
protons and neutrons
what is the mass number of an atom
the total number of protons and neutrons it contains
what is the atomic number of an atom
the number of protons it contains
what is bigger, the atomic number or the mass number
the mass number
how do you work out the number of neutrons in an atom
mass number - atomic number
what are shells
the rings of energy that the electrons create around the nucleus
how many electrons can the first shell have
2
how many electrons can every she’ll have (apart from first)
8
things to remember when doing an electronic structure diagram
- nucleus is a black spot
- energy levels are circles around the nucleus
- each electron is shows as a dot or a cross
how to use the periodic table to help with an elements electronic structure
- find out what period it is in (number of shells)
2. find out what group it is in (number electrons in outer shell)
what are all substances made up of
atoms
how many different elements are there
about 100
what is the point of groups in periodic table
the groups contain elements with similar properties
