a) They are solid at ambient temperatures of 25 ° C and pressure of 1 atm.
b) Ionic compounds represent high temperature melting and boiling.
c) They are hard and brittle and then subjected to the impact, break easily, creating planar faces.
d) When dissolved in water, or pure liquid, carry electrical current due to the existence of ions that move freely and can be attracted by the electrodes, closing the electric circuit.
e) His solvent is water.
true or false
False hope this helps
red dwarf
white dwarf
pulsar
black hole
Answer:
The correct answer is pulsar.
Explanation:
Protostar : Its a young star with contracting mass which gains mass from its parent molecular cloud. At this stage fusion process does not start.
Red dwarf: A star having lower surface temperature , luminosity, mass and size than of the sun.
White dwarf : its an ultimate stage for an average mass star like sun . its a small dense star with size relatively equal to planet.
Pulsar : A rotating neutron star that emits beam of radio waves and other electromagnetic radiations.
Black hole: It is region of space time with very strong gravitational pull that even smallest particle or electromagnetic wave is incapable to escape it.