Question

A white powdery substance X immediately sets into a hard mass on adding ga
liquid Y to it. IN hospitals, a thick coat of te paste of substance X is applied over the
bandage on the fractured bone of a patient to keep the fractured bone in place to get
joined properly.

(a) What could the substance X be?
(b) Name the liquid Y.
(c) What type of change occurs in X on adding Y?

Answer 1

Answer:

• Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).