Which one of the following non-metals is liquid?
Iodine
Sulphur
Bromine
Phosphorus
C.
Bromine
Bromine is the only non-metals exists in a liquid state at room temperature. It is a reddish-brown liquid. It is extracted mainly from carnallite.
Which of the following properties of water can be used to explain the spherical shape of rain droplets?
Surface tension
Critical phenomenon
Viscosity
Pressure.
Which scientist discovered the radioactive element radium?
Albert Einstein
Benjamin Franklin
Isaac Newton
Marie Curie