Which element has a radioactive isotope that is often used to date rocks younger than about 60,000 years?

a. uranium
b. rubidium
c. carbon
d. strontium

What happens when the temperature of a solution increases?

Sally is making a model of a magnesium atom with an atomic mass number of 24 for her chemistry class. she has foam balls for the protons, neutrons, and electrons. she has added 6 neutrons to her model so far. how many more neutrons does she need to add to complete her neutral atom of magnesium?

Acetylene gas c2h2 undergoes combustion to produce carbon dioxide and water vapor how many grams of water are produced by the same amount of c2h2?