Elementary, my dear …

Question

My list for today

• Iodine-Sulfur+Americium-Scandium:Phosphorus
• Iodine-Titanium+Molybdenum+Thorium+Yttrium-Lithium:Helium
• Praseodymium+Oxygen+Vanadium+Erbium+Boron+Sulfur-Lithium:Aluminum
• Germanium+Neon+Silicon+Sulfur-Tin:Hydrogen#Carbon
• Phosphorus+Sulfur-Cesium:Neon

______

Iodine-Potassium+Iodine-Sulfur:Oxygen
Iodine+Sulfur-Barium:Neon#Calcium
Praseodymium+Oxygen+Vanadium+Erbium+Boron+Sulfur-Neon:Nitrogen#Helium

James VI and I wanted me to tell you:
Many words can have different meanings, but that's not usually true of the words in this list.
But here, these words do have different meanings, depending on how they're being used.

What is the meaning of all this?

Answer 1

The message says

HAVE A HAPPY FATHER'S DAY / IN LOVING MEMORY

and it works as follows:

everything up to the last "-" uses the elements' symbols to indicate a book of the bible; after that the element numbers indicate a chapter and verse; sometimes there is also a word number. (When there isn't we take the first word.)

And of course

the note about "King James VI and I" (that's a Roman number 1, not a first-person-singular pronoun) indicates that we should use the so-called King James translation.

We get

I Samuel 21:15 Have ...
I Timothy 3:2 A ...
Proverbs 3:13 Happy ...
Genesis 50:1 #6 ... father's ...
Psalm 55:10 Day
--
I Kings 16:8 In ...
Isaiah 56:10 #20 ... loving ...
Proverbs 10:7 #2 ... memory

And

Rubio, if this implies what I guess it does then I am sorry for your loss. [I don't mean to imply that it must have been very recent.]

Credit where due: There were a couple of errors in the first version of this answer, which I have fixed after Rubio kindly pointed them out.

Discredit where due: I originally claimed that one element in the process was "sometimes slightly sketchy", but the sketchiness was in fact all in my head. Sorry, Rubio!