How was helium first discovered?

Why must you be cautious of chemical exposure in the workplace?

Write the formula for the polyatomic ion in KOH. Express as an ion ...

1.2 kg of aluminum at 20oC is added to 1.5 kg of water at 80oC. After the system reaches thermal equilibrium, what is its final temperature (in oC) ?

How many protons and electrons are present in Au+?

What is a severe weather watch

Convert 1.72 moles of magnesium carbonate to formula units

5 atoms Pb to mol Pb

The diagram above shows the results of Rutherford's experiment in which he used a radioactive source to "shoot" alpha particles at a thin sheet of gold foil. Based on these results, what were Rutherford's conclusions? A.

Raphaela wants to enter the school science fair and has a list of ideas for a project. Which questions could she answer through scientific investigation? Check all that apply.

When you open a solid room air freshener, the solid slowly loses mass and volume. how do you think this happens?