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’.

List the path of the respiratory system

Select all of the statements which are true. electrons are located in shells or orbits around the atom. electrons orbit slowly around the atom. electrons travel in one flat path around the nucleus of an atom. the valence of an atom is determined by the number of electrons in the atom's outermost shell.

The arrangement of particles is most ordered in a sample of