An elements atomic number is 99. how many protons would an atom of this element have ?

Which is a chemical property of iron? a. it forms iron oxide (rust) when exposed to moisture and air. b. it is a gray–black metal that is hard to the touch. c. it has a melting point of 2795°f (1536°c). d. it is a good conductor of heat

What is the main reason why some developing countries fear the increase the free trade policies around the world?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?