Model in which electrons are found in fixed levels around the nucleus and require energy to move from level to level:

a.

Bohr model

c.

Quantum mechanical model

b.

Rutherford model

d.

Free-electron model

When calculating the density of a liquid you measure 8.2 ml in a graduated cylinder with markings every 1 ml and measure the mass on a balance 9.548g. what is the density of this liquid with significant figures?

Write the electron configuration of the atom in the third row of the periodic table that has the smallest ei4.

A solid brown metal is added to a clear acid solution. A white powder appears and the acid solution becomes cloudy. Which type (s) of change have/has occurred

How do I convert 4,500mm to a m

What type of chemical bond links the monomers in a polymer?

In the following diagram the counter clockwise torque is?

A water wave travels 36 meters in 15 seconds. whatvis the speed of water?

Which type of wave cannot move without a medium in which to travel? Heat waves Light waves Sound waves Transverse waves

Which describes the burning of fossil

The flow of energy in an ecosystem is the best described as energy moving in