Is Matter Around Us Pure? — Science STD 9 — Question

Amoeba can change their __________ continuously. (Shape, Size, Nucleus)

The formula unit mass of Ca₃(PO₄)₂ is _______. (310, 200, 150)

The number of protons in the nucleus of an atom is called its __________. (Atomic number, Mass number, Valency)

If the nucleus of an atom has atomic number 17, mass number 37, and 17 electrons outside the nucleus, the number of neutrons in it is ____________. (20, 17, 37)

Neon and chlorine have atomic numbers 10 and 17, respectively. Their valencies will be 0 and _________ respectively. (0, 1, 2)

The ability of a body to do work is called _____. The ability of a body to do work because of its motion is called _______.

Name the organelle: Packaging and dispatching unit of the cell (Golgi complex, Ribosome, Vacuole)

The subatomic particle not present in a hydrogen atom is _________. (Neutron, Proton, Electron)

_________ have guard cells. (Stomata, Phloem, Cortex)