Which of these elements exists as a solid at room temp and pressure?

Chlorine, bromine and iodine. Why?

Which statement about subatomic particles is true? Protons are the only subatomic particles to have charge. Electrons are the subatomic particles with the smallest mass. Neutrons orbit the nucleus of the atom.

If the coal is burned in a power plant that uses 2000 tons of coal per day, what mass of calcium oxide is required daily to eliminate the sulfur dioxide? How many grams of calcium sulfite are produced daily by this power plant?

What are the contents of a electron cloud?

According to avogadro's law, what is characteristic of 1 mole of gas at stp?

In the lab, you use a special balloon that is permeable to water but not sucrose to make an "artificial cell.

What do dipole-dipole forces do? A. Replace covalent bonds with hydrogen bonds B. Turn nonpolar molecules into solids C. Hold polar molecules together D. Hold nonpolar molecules together

As the moon revolves around earth, it also rotates on its axis. Why is it that the same side of the moon is always visible from earth

The SI unit for quantity of radioactive materials is:

If you choose to wear loose clothing, large or dangling jewelry, or contact lenses to lab, which of the following statements best represents how you should proceed? A.

Which of these elements exists as a solid at room temp and pressure? Chlorine, bromine and iodine. Why?