some might. for example the tamper of a "clean" hydrogen bomb might be tungsten instead of uranium to reduce fallout.
12, 324 nuclear warheads are located in the United states. mind you not all of them are in a missile, they are merely the warheads.
The USA do
The UK is estimated to have a stockpile of approximately 160 active nuclear warheads and 225 nuclear warheads in total.
Pens do not contain tungsten.
as per today's update Russia has more than 3000 nuclear warheads(deactivated),1200 warheads ready for use. US has nearly 2400 nuclear warheads stockpiled and 400 nukes ready for use.
About 30,000.
yes
In nuclear reactors used to generate electricity, and in many nuclear warheads.
Yes, plutonium is used in nuclear weapons.
300
to kill people
Russia