Here is the compounds i made my element collection from:
1.Hydrogen: From HCL
3.Lithium: Li-Ion battery from old battery.
5.Boron: Neodmyum Magnet (You can find 2 small magnet in your PC CD/DVD.. writers laser head)
8.Oxygen: Cerium dioxide lighter flints has oxygen in them
9.Fluorine: Toothpaste (from household)
11.Sodium: Salt with sodium
12.Magnessium: Wire (Flammable! Search for it)
14.Silicon: LED (Small 3mm)
15.Phosphorus: Match plate
16.Sulfur: Match head
17.Chlorine: Potassium chloride
19.Potassium: Potasyum chloride (Known as NoSalt)
26.İron: Flyback (Flyback transformers has pure iron)
29.Copper: Pure copper plate (2" x 4" sheet is 5$)
30.Zinc: Zinc-carbon battery
31.Gallium: LED(Blue leds has gallium in them, you can't be sure for it. Sorry)
32.Germanium: Germanium Diode (Zener diode in the picture)
47.Silver: From old fuse
50.Tin: Solder wire
53.İodine:Salt with iodine
58.Cerium: Cerium oxide lighter flints
60.Neodymium: Neodymium Magnet
74.Tungsten: Lamp filament
79.Gold: Pure gold (From old computer. Melted and tested with acids.)
80.Mercury: From lab
82.Lead: Fishing Weight
90.Thorium: From Uranium Rock
92.Uranium: Bought (5gr 15$) (İf you have uranium you have all of the decays including Thorium-90)
I didn't listed uranium decay daughters because they are very unstable. Some of them have 20 minute of life.
Lithium: Put in oil, because it gives reaction with oxygen very fast. (Syringe is needed)
Mercury: Gives very good weight effect. Fluorine: Toothpaste dissolves capsule with enzymes in it. So wrap toothpaste piece with aluminium foil before putting into capsule.
Hydrochloric Acid: Using in household cleaning. You can find it on markets. Also if you puke you can get HCL from it (Joking).
You will need aluminium foil for reaction.
1L Erlenmeyer Flask ($15)