Exam 9: Chemical Reactions

The lowest energy level of a hydrogen atom (n = 1) is called

A beam of light can be thought of as consisting of a stream of particles called ______________.

The n = 2 energy level is known as the (two words) ______________ ______________ state.

The number of electrons in a hydrogen atom is ______________.

The transitions of an electron in the hydrogen atom to the n = 2 level result in the

When a hydrogen atom's electron goes from an energy state of n = 1 to n = 3,

The ""billiard ball model" of the atom is associated with

As the speed of an object decreases, its wavelength

A useful instrument that makes use of the wavelike properties of electrons is the electron ______________.

A quantum of electromagnetic radiation is called a(n)

The second excited state for an electron in a hydrogen atom would be where n equals ______________.

Niels Bohr focused his attention on the element hydrogen because it

The "plum pudding model" of the atom is associated with

The concept of the dual nature of light indicates that electromagnetic waves sometimes act like ______________.

The energy levels of electrons in atoms are ______________, which means that only certain values of energy are allowed.

Dispersing light from a hot, low-pressure gas gives a spectrum of the type known as (two words) ______________ ______________.

Which of these colors of light has photons of greatest energy?

The smaller the frequency of light, the smaller the ______________ of its photons.

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

Which of these colors of light has photons of greatest energy?