Exam 9: Chemical Reactions

Addition of an electron to an atom leaves a

The development of physics prior to 1900 is called

The unit called the hertz (Hz) is equivalent to

For a specific element, photons of how many different energies could be emitted by electrons in the n = 3 level as they return to the n = 1 level?

Light from an incandescent wire travels through a cool gas and is then dispersed into a(n) ______________ spectrum.

Calculate the energy, in joules, of photons of light with frequency 6.00 $\times$ 10¹⁴ Hz.

Niels Bohr reasoned that a discrete line spectrum must be the result of a(n) ______________ effect.

The energy differences in some of the rotational energy levels of the water molecule allow cooking with ______________.

Calculate the energy in electron volts of the photon emitted when an electron in a hydrogen atom goes from n = 2 to n = 1.

Which element was detected in the Sun before it was found on Earth?

With which object would the wave nature of matter be significant?

When many of the atoms or molecules in a sample have been excited into a metastable state, a(n) ______________ has occurred.

The most important force in the hydrogen atom is

If the energy of n = 5 is -0.544 eV and that of n = 2 is -3.40 eV in a hydrogen atom, a transition from n = 2 to n = 5 will absorb a photon of what energy?

Niels Bohr postulated that the hydrogen electron radiates energy only when it makes a(n) ______________ from one allowed orbit to another.

The number of electrons in an atom of an element is the same as the element's

When fast electrons strike a metal target, what are produced?

The development of physics since about 1900 is called

Which is a possible value for the principal quantum number n?

When an electron goes from the ground state to an excited state,