Probably Lead or Tin for the solder. There is copper and small amounts of other metals for conductors. Semiconductors mostly silicon in the chips themselves. The boards are compounds and are not likely to have anything close to elemental form of materials.
Today.
no, it is most commonly found as a compound
hydrogen is most commonly found as a part of water with oxygen.
notepad
No. If you burn an element, you will turn it into a compound (most commonly [element burnt] oxide). Which will not be an element.
binary and hexadecimal
Oxygen, hydrogen, halogens
The most commonly use cbis is microcomputers, and they consists of personal computers (PC) like desktops computers, and laptops. Although big government company's still uses Super computers and Mainframe computers, you will find the microcomputer more affordable, efficient and capable of performing most of the tasks that is required off.
cache
5th generation
Very probable this element is oxygen.
Polonium doesn't contain another element.