C1.1 Atoms topic Flashcards
There are about ___ different elements and more than _____ compounds
100
1000
What are the parts of an atom ?
There is a small central nucleus (made up of sub atomic particles - protons and neutrons ) and there is electrons in the shell around it
What is the charges of a
Proton ?
Neutron ?
Electron ?
Proton - +1
Neutron - 0
Electron - -1
The number of electrons in an atom is equal to the number of _______ in the _______.
Protons
Nucleus
______ have no overall electrical charge
Atoms
All atoms of a particular element have the same number of _______ . Atoms of different elements have different numbers of _______ .
Protons
Protons
What is the relative atomic mass (mass number ) the sum off ?
(The top number in the element thing )
The sum of protons and neutrons in an atom
The atomic number (the bottom number ) is also the ______ number
Proton
Since an atom had equal numbers of protons …..
… The charges cancel out
How do u balance an equation ?
Look on note sheet but …
See what number of each element is on each side of the equation and make each side equal the same
What is special about elements with the same number of electrons in their highest energy level ( outer shell ) ?
It means they have similar chemical properties and they are in the same group
What are the elements in group 8/0 called ?
The Nobel gasses
Why are Nobel gasses unreactive ?
Because they have full outer electron shells ( their atoms are stable arrangements of electrons )
Covalent bonding happens between ?
A non metal and a non metal
What does covalent bonding involve?
Sharing of electrons
Oxygen produces simple m_______ c_______
Or
Giant c_______
Structures like D _______
Molecular compounds
Covalent
Diamond
What happens in covalent bonding ?
Both atoms want a full outer shell , so share an electron/ electrons so they both have a full outer shell
What is special about the bonds in covalent bonding ?
They are very strong so difficult to break
What is a molecule
2 or more atoms that have been chemically joined with covalent bonds
What is an element
Contains only 1 type of atom
Ionic bonding is between a ?
Metal and a non metal
Ions can be ______ or ________
Positive or negative
In ionic bonding it is the __________ of electrons and it is not to do with _______ .
Transfer
Molecules
In ionic bonding they want a s______ , full _______ ____.
Stable full outer shell
In ionic bonding if the atom looses an electron this means it becomes _____ charged
Positively
In ionic bonding if an atom gains an electron , this means it becomes ______ charged .
Negatively
What is an element
A substance which is made of only one sort of atom
