Which of the following objects require the use of a small - scale model

In 1911, Hans Geiger and Ernest Marsden (working under Ernest Rutherford) conducted an experiment involving alpha particles and gold foil that led to the discovery of the nucleus in atoms. The nucleus of an atom accounts for.

What do Potassium and Krypton have in common and what are their differences based on their location on the periodic table? Potassium (K) and Krypton (Kr) on in the same period, so they have the same number of electron shells.

A dose of aspirin of 5.0 mg per kilogram of body weight has been prescribed to reduce the fever of an infant weighing 8.5 pounds. The number of milligrams of aspirin that should be administered

Matt needs a suggestion to test the nature of solution besides it's taste and corrosiveness. What suggestion would you recommend her to identify the acid and alkaline nature of the solution?

The low-resolution mass spectrum of an unknown analgesic X had a molecular ion of 151. Possible molecular formulas include C7H5NO3, C8H9NO2, and C10H17N. High-resolution mass spectrometry gave an exact mass of 151.0640.

A nitrogen-containing compound shows no absorption band at ∼3400cm-1 and no absorption bands between ∼1700cm-1 and ∼1600cm-1. what class of compound is it

What is the mass of 35.2 ml of a solution that has a density of 1.12 g/cm (in dimensional analysis)

What is the molecular geometry, or shape, of beryllium chloride (becl2) ?

What is the best category for nf3? 1. amphoteric ion 2. lewis acid 3. salt 4. bronsted-lowry acid 5. arrhenius acid 6. arrhenius base 7. lewis base 8. weak electrolyte?

100 g = ___hg for science