Basic Chemistry
the study of matter and the changes it undergoes
What is chemistry?
Symbolized by e-, the charge is 1-, and the mass is so small that its usually rounded to approximately 0 amu. Also, moves around in a empty space
What is an electron?
The number of protons in an atom, the symbol is Z.
What is atomic number?
the spontaneous emission of radiation by atoms with unstable nuclei.
What is radioactivity?
a form of energy that exhibits wavelike behavior as it travels through space
What is Electromagnetic radiation?
What is matter?
a small until of mass used to report the masses of atoms and subatomic particles; its size is defined as one-twelfth the mass of an atom of carbon-12
What is a atomic mass unit?
atoms with the same number of protons but different numbers of neutrons. Are atoms of the same element that differ in mass number.
What is Isotopes?
When an atom undergoes radioactive decay. The atom's nucleus changes. An atom will often turn into a different element.
What is a nuclear reaction?
the shortest distance between two equivalent points. It is often thought of as the distance between two adjacent crests or two adjacent troughs. Common units are meters and nanometers The variable used in mathematical equations is λ
What is wavelength?
matter that has a define composition; it has a chemical formula
What is a pure substance?
What is a proton?
The sum of the atomic number and the number of neutrons in the nucleus. The symbol is A.
What is mass number?
Is a helium-4 nucleis consisting of 2 protons and 2 neutrons. One of its symbols is 4/2 He. It has a mass of approximately 4 amu with a charge of 2+
What is Alpha radiation or alpha particle?
is the number of waves that pass a given point per second. It is the number of cycles completed per unit time. A common unit is hertz. the variable used is ν
What is frequency?
A pure substance that cannot be broken down into a simple substance by a physical or chemical mean
What is an element?
Symbolized by n°, the charge is 0, the mass is 1 amu, and located inside the atomic nucleus.
What is a neutron?
The weighted average mass of the naturally occurring isotopes of an element
a high-speed electron. One of its symbols is 0/-1 β. It has a mass of approximately ) amu and a charge of 1-.
What is Beta radiation or a Beta particle?
the wave's height from the origin to a crest or origin to a trough. It is the wave's maximum displacement from zero. For light waves, it is rarely calculated.
What is amplitude?
The smallest particle of an element retains all the properties of the element; it is electrically neutral, spherically shaped, and composed of electrons, protons, and neutrons.
What is an atom?
Located in the center of an atom, small in volume, positively charged, and contains most of the atom's mass.
What is a nucleus?
An atom that contains 15 protons is what element?
What is phosphorus?
is a high-energy form of electromagnetic radiation. It is like a high-energy X-ray. One of its symbols is 0/0 γ. Because it is pure energy and not a particle, it has no mass and no charge.
What is Gamma radiation or a Gamma Ray?
For a given type of electromagnetic radiation, its wavelength is related to its frequency through a mathematical equation.
What is c= λv?