Structure Of An Atom Flashcards
What is the relationship between atomic mass and atomic number
The atomic mass is the number of protons plus the number of neutrons
What is the relationship between the number of protons and electrons
They are the same/ there is the same amount of them
What are the relative charges and masses for protons neutrons and electrons
Protons +1 relative mass 1
Neutrons 0 relative mass 1
Electrons -1 relative mass 1/2000
What makes an atom stable
If the outer shell is full
What is an isotope
Atoms of the same element when different numbers of neutrons. They have identical chemical properties but their physical proporties such as density differ.
Give the atomic properties of fleuorine -
9 protons 10 neutrons and 9+1 electrons
What is ionic bonding
When elements gain or loose an electron in a reaction so as to have a full outer shell
How do metals form positive ions
Loosing electrons
Non metals form negative ions by…
Gaining electrons
How are ions held together
By using electrostatic attraction
What is the most reactive of the alkali metals
Francium
What is the most reactive of the halogens or group 7
Fleourine
