Question from a viewer: For each of the following pairs of atoms, write a likely formula for a simple compound made from them, and indicate if the bonding is ionic or covalent.
A) Ca & Cl
B) S& H
C) Cl & N
D) Fe & Br
Ca and Cl --> Ca is a metal, Cl is a non-metal, therefore they are IONIC together
Video of me drawing the diagram to connect the two: https://www.youtube.com/watch?v=8aDXuwsDxWE
S and H are both non-metals --> they are COVALENT together.
S brings 6 valence electrons and needs two more. H brings one each, so you need TWO hydrogens to bond with ONE sulfur --> H2S
Cl and N are both non-metals --> they are COVALENT together.
N has 5 valence electrons and needs 3 more. Each Chlorine shares ONE and so you need THREE chlorines --> NCl3
Fe is a metal and Br is a non-metal --> they are IONIC together.
This one is tough unless you know (or have a periodic table that tells you) that Fe can have charges or either +2 or +3.
+2 charge --> FeBr2
+3 charge --> FeBr3