13. What physical property is characteristic of all of the elements in the group located in the rightmost column of the periodic table?
A.
very high melting point
B.
gas state at room temperature
C. good conductor of electric current
D. extremely brittle solid at room temperature

Why would a doctor most likely restrict a patient's contact with other people while the patient receives internal radiation

How does water evaporating from a glass show that matter is made up of particles? a. the heat energy from the air causes the glass to fill up with water particles. b. the liquid water particles turn into water vapor that spreads in the air. c. the particles of the glass dissolve in water and cause it to evaporate. d. the tiny particles of the glass evaporate and seem to disappear.

What is the volume in liters of 7500 g of helium atoms. assume stp conditions.