The gas used to fill party ballons contain only helium atoms .this make helium a(n).

a gas

hope this is right

the anser on apex is element

the answer is f1 and d2 because if you put equal force on those two points the beam would balance trust me on this

answer

procedural programming, object-oriented programming

explanation

procedural programming is a type of computer programming language that specifies a series of well structured steps and procedures   within its development period of time. it contains a systematic order of statements, functions and commands to complete a computational task or program. it is centered on creating procedures. while object oriented programming is a programming language that is centered on creating objects rather that actions and data rather than logic.. it has four principles which are inheritance, polymorphism, abstraction and encapsulation