Which scientist is known for developing the planetary model of the atom?

Niels Bohr

Albert Einstein

Johannes Rydberg

Robert Millikan

Potassium, k, has an atomic number of 19 and an atomic mass of 39 how many electrons does a neutral atom of K have?

What does float and sink have in common

what is name of first man made element?

In the current model of the atom, ___. electrons and protons are mixed together in a solid sphere electrons orbit around the positively charged nucleus in set patterns called orbitals electrons travel as waves in the electron cloud that surrounds

True or false a compound is matter

Using density what is the mass in grams of 150mL of a liquid with a density of 1.4 g/mL

All of the following can be recycled except clothing aluminum cans compact fluorescent bulbs plastic drink bottles

Use Henry's law and the solubilities given below to calculate the total volume of nitrogen and oxygen gas that should bubble out of 1.0 L of water upon warming from 25 ∘C to 50 ∘C.

Washing soda, a compound used to prepare hard water for washing laundry, is a hydrate, which means that a certain number of water molecules are included in the solid structure.

When you light a fire place what energy transformation takes place