Electrons orbit around the nucleus of atoms in allowed energy states. This is the basis of the theory of which scientist?

A. John Dalton

B. Niels Bohr

C. Albert Einstein

Will mark as brainliest Which organism would be found at the beginning of a food chain? A. fish B. ocean C. algae D. whale

Vaccines are used to prevent disease. They are given to patients as dead or weakened forms of a virus. Which disease would most likely have a vaccine?

Nitrogen dioxide, NO2 (g) (Delta. Hf = 33.84 kJ/mol), is decomposed according to the following reaction: 2 upper N upper O subscript 2 (g) right arrow upper N subscript 2 (g) plus 2 upper O subscript 2 (g). What is the enthalpy change when 2.

Where is the most basic building blocks of all organisms

Can alkenes react with potassium dichromate vi

Which fossil fuel is the most widely consumed in the United States? A. petroleum B. natural gas C. peat D. coal

Why is the use of natural gas as a full becoming more common

A swimming-pool worker wants the pool's pH to be 7.2. She comes by to test the water and finds that the pH is 9.2. What should she do to correct this situation? A. Add water. B. Add base. C. Add acid. D. Do nothing.

What type of rock is sandstone

According to the Br? nsted-Lowry theory, water A. acts as a base when it accepts a hydrogen ion. B. can be neither an acid nor a base. C. can act as an acid by accepting hydrogen ions. D. can accept but not donate hydrogen ions.