Chapter 1: Structure of the Atom (copy)

Chemical reactions

________ are simple arrangements of atoms from one combination to another in small whole- number ratios.

energy of electromagnetic waves

The ________ is proportional to the frequency and inversely proportional to the wavelength.

1900

In ________, Max Planck described light as packets, or quanta, of energy called photons.

William Crookes

Sir ________, the scientist who developed cathode ray tubes in the 1870s, originally thought cathode rays to be negatively charged molecules instead of electrons.

Alpha

________ particles- ________ particles are complicated, but the only thing you need to remember about them right now is that they are positively charged particles.

discrete wavelengths

The colors consist of ________ of light (line spectra) and not a uniform rainbow found when white light is separated by a prism.

Visible light

________ is only a small part of the electromagnetic spectrum.

Matter

________- In chemistry, ________ is any physical substance that has mass and takes up space by having volume.

Uncertainty principle

________- The ________ states that the position and momentum of any particle can not both be known at exactly the same time.

Niels Bohr

________ created a theory that electrons move around the nuclei in circular orbits and that electrons only exist in certain "allowed orbits ..

Oil drop experiment

________- This was an experiment performed by Robert Millikan, which allowed him to calculate the charge of an electron to be- 1.60 x 10^- 19 columbs.

proton

The ________ has a mass of 1.67 x 10^- 24 gram.

Neutron

________- The neutron is the third major particle that marks up the atom, but has no charge.

electromagnetic radiation

All ________ may be considered as waves that are defined by their wavelengths and frequencies.

Spectroscope

________- A spectroscope is a machine that is used to produce and record the light /color spectra of a particle for examination.

Wavelength

________ has units of meters and any necessary appropriate prefix.

Frequency

________- The frequency is defined as the number of waves that pass a point in space in one second.

Plancks constant

________- The proportionality constant, h, has a value of 6.63 x 10 ^- 34.

Molecule

________- A molecule is a combination of two or more atoms.

Daltons

________ atomic theory- John Dalton created a scientific theory on the nature of matter and atoms, consisting of three major components.

Atoms

________ are often referred to as the basic building block of life.

Electrons

________ were discovered in 1879 by J. J. Thompson, when he determined that cathode rays were fundamental parts of matter he called ________.

Proton

________- A proton is a basic unit of positive charge in the atom.

Atom

________- An atom is the smallest unit into which matter can be divided.

Wavelength

________- The wavelength is the distance between two repeating points on a sine wave.

proton

The ________ has a positive charge which is exactly equal in magnitude to the electron charge.