The air has nitrogen in it. I think most plant based foods (such as spinach) contain nitrogen (it is used as a fertilizer in soil, so I assume it's a necessary mineral for plant growth). Possibly also in aerosol propellant canisters (such as squirty cream or hair mousse).
No, rubidium is not found in household objects.
Two household objects that have magnets are: fridge magnets, and sizzlers
The air that is all around us has nitrogen in it.
Mostly household cleaners
none
ammonia ammonia
There are many common household base compounds formed from nitrogen and hydrogen. Some of them include hydrogen peroxide, household dyes, cleaning agents and so much more.
Scissors, ax
loads
The wife.
clock
There are quite a few objects in a household that may be made of fiberglass. One of these objects is the siding on the house itself. Other objects include insulation, electronics, doors, showers, and bathtubs.