Chem Questions Flashcards
What makes up the nucleus of an atom
Protons
Neutrons
Equation for the max number of electrons per shell
=2n^2
n= number of shells
when is an atom most stable
When the outer shell is completely full
What is the electron configuration of Boron
2, 5
2,6
Oxygen
What do periods in the periodic table tell you
How many shells the element has
What do groups in the periodic table tell you
How many valence electrons
Why are electrons lost in ionic bonds
Electrons are lost from outer shell, as these electrons are the most weakly attracted to the protons within the nucleus.
What does
sodium +1
chlorine -1
mean
Sodium lost 1 electron and is now positively charged
and
Chlorine gained 1 and is now negatively charged
When do covalent bonds form
Two or more non metals
When do ionic bonds occur
Between a metal and a non metal
How many electrons would Hydrogen need to share to be stable
One each.
Which ways across the periodic table does reactivity increase
Left and down
Li, K, Na, Ca, Mg, Al, Mn, Cr, Zn, Fe, Ni, Sn, Pb, H, Cu, Hg, Ag, Au, Pt
Reactivity Series
What happens when Zinc is placed into a solution of Copper sulphate. (ZN is more reactive Than Cu)
The Zn Displaces the Cu
