cipher - Ooohh, it all makes sense now! :D

Introduction

As requested by @Rubio, I am here to state that this is a metapuzzle based on other puzzles listed below.

"Ooohh, it all makes sense now! :D" ~ Mr Pie

The Puzzle

Or does it? Answer is a two-digit number.

|....-..|||-||...-...||//.||||/....|-.....

Answers from various users in different questions:

1) Cryptic, then Crossword, then Clues

CARBON (by Gareth McCaughan)

2) Word Web - A Hard One

CALCIUM (by Gareth McCaughan)

3) Not Just Black and White

VANADIUM (by phenomist)

4) Omni-Riley-Rebuses

GERMANIUM (by Gareth McCaughan, still...)

5) Snakes and Ladders

LEAD (by JS1)

6) Nono-Cube: Approach at Your Own Risk

RADIUM (by Gareth McCaughan, again!!)

7) Mono-Tonic Crpytic-Clues

DUBNIUM (by Gareth McCaughan, for the $n^{th}$ time...)

The metapuzzles part is yet to be solved...

Hint:

_{helpfulness level 1:}

|. rot 90°

Answer

As JProblems found out, the cipher is Morse code but with | instead of -. In decimal form, it's 6-2-7-3//1/4-5.

Using the answer from each subpuzzle (e.g. the sixth answer is radium, so substitute 6 → radium), we get:
radium-calcium-dubnium-vanadium//carbon/germanium-lead.

This describes lines drawn on the periodic table:

So the final two-digit answer is

the atomic number of Ni (nickel), which is 28.