Chemistry Flashcards
what are the three main sub-atomic particles
protons, neutrons and electrons
where are they all found in the atom
protons and neutrons are found in the centre of the atom. electrons form a series of shells around the nucleus
what are the max numbers of electrons in shells
1-2
2-8
3-8 (can go to 18 after first 20)
what is the name of the outer shell
the valency electrons
what is the arrangement of electrons called
electronic configuration
how do you remember how many shells
the group number is the number of shells that the atom has
first 20 elements
Hydrogen, Helium, Lithium, Beryllium, Boron, Carbon, Nitrogen, Oxygen, Fluorine, Neon, Sodium, Magnesium, Aluminium, Silicon, Phosphorus, Sulphur, Chlorine, Argon, Potassium, Calcium.
what is an ionic compound
its a metal and a non-metal combine together
how are ions formed
is formed by an atom gaining or loss of an electron
who loss there electrons
the metals lose there electrons from their outer shell
who gains electrons
non-metal gain there electrons to there outer shell
who forms positive ions
metals form positive ions
who forms a negative ions
non-metals forms a negative ions
