Pls answer only if you know, or I'll report your An unknown element X reacts in air to form its oxide Y. This Y dissolves in water which turns blue litmus into red.
Predict the nature of oxide ‘Y’ and tell whether ‘X’ is a metal or a non-metal? Name two elements that behave like ‘X’.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms

i think is conclusions.i think so

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.