5.5 Atomic Emission Spectra

Hydrogen's spectrum consists of ____ lines of visible light.

4

In the emission spectrum of helium, which has 2 electrons, we see ____.

5 colors

What happens when an atom that is in its ground state is supplied with energy?

Electron(s) move from lower energy levels to higher energy levels.

_____ spectrum is formed when atoms or molecules are de-excited from higher energy level to lower energy level.

Emission

If an electron jumps from a higher energy level to a lower energy level, energy will be _____.

Emitted

Absorption spectra are produced when an excited electron returns back to its ground state.

FALSE

Line spectrum is also known as the absorption spectrum.

FALSE

The emission spectrum of a chemical element is the pattern of wavelengths obtained when the element is subjected to a specific excitation.

FALSE

The ground state of an atom, has the higher energy state.

FALSE

We cannot identify elements by using their emission spectrum.

FALSE

What happens when an electron jumps from a higher energy level to a lower energy level?

It emits a specific wavelength distinct to that element

In an electric discharge, the emission spectra of helium is an example of _____.

Line spectra

An atom is said to be in an excited state when it possesses more energy than when it is in its ground state

TRUE

An emission line spectrum is produced by low-density hot gases.

TRUE

Each element produces a unique atomic emission spectrum.

TRUE

Emission lines are seen when electrons return to the ground state, releasing light.

TRUE

Energy is absorbed when an electron jumps from a lower energy level to high energy level.

TRUE

Light is emitted by an electron when it loses energy and returns to the ground state.

TRUE

The energy released when an electron jumps from the excited state to the ground state is equal to the difference between the two levels.

TRUE

Which statement correctly describes the energy that is absorbed by an atom?

The energy that can be absorbed by an atom is quantized.

What would an atomic emission spectrum look like if the electron's energy levels in an atom were NOT quantized?

The spectrum would be continuous.

When light released as a result of electrons falling back down to the ground state is viewed through a spectroscope (prism), the result is called a(n) _____.

atomic emission spectrum

When an electron in an atom moves from high to low energy levels:

energy is emitted as electromagnetic radiation

When an electron is in the ____ state, it has a higher potential energy than it does in the ground state.

excited

The state of the atom in which one or more electrons occupy a higher energy level is called the _____.

excited state

The hydrogen spectrum has ____ lines.

four

A tube filled with gas through which electricity is passed is called a(n) _____.

gas discharge tube

An atomic emission spectra consists of _____.

lines of different frequencies