Which element is a metal that is in the liquid phase at STP?

Which statements describe the death of stars? Check all that apply. A. Astar's final stages of life depend on its mass. Stars die when they run out of fuel. B. When a star starts to die, its core expands. C. The outer portion of the star contracts.

Write the equilibrium constant expression for the reaction below. CS2 (g) + 4H2O (g) ⇌ CH4 (g) + 2H2S (g)

Write the chemical equation for the following word equation: Potassium metal and chlorine gas combine to form potassium chloride.

How is carbon-14 is different from carbon-12?

If core electrons completely shielded valence electrons from nuclear charge (i. e., if each core electron reduced nuclear charge by 1 unit) and if valence electrons did not shield one another from nuclear charge at all, what would be the effective

How would the equilibrium of an exothermic reaction at 25°c be affected if the temperature of the system were reduced? (hint: apply le chatelier's principle) ?

Which is the most practical argument for the continued funding of space exploration? a) Space exploration will one day show whether life exists on other planets in star systems similar to ours.

33 protons 36 electrons 45 neutrons

The periodic table includes all of the known elements in the world. how are elements arranged on the periodic table?

The pOH of a solution is 13.28. What is the [OH]