I am the positively charged particle that determines the identity of any element. Give my name? please guys and girls can yall help me I'm in 8th grade

Which of the following bonds would be most polar? a. c-i b. c-br c. c-cl d. c-f e. c-o

(a) if the pressure in gas is doubled while its volume is held constant, by what factor do (i) vrms and (ii) change? (b) is it possible to boil water at room temperature (20oc) without heating it? explain.

What equation is used to calculate the weight of an object on a plant ?