Flashcards in Chemestry Deck (18):
Made from electrons (-), neutrons (-/+) which are found in the nucleus and protons surrounding the nucleus.
An atom contains electrons (-) neutrons (+/-) and protons (+) with a nucleus and a shell.
Anything made up of atoms except energy.
A stable subatomic particle with a negative charge found in all atoms.
A subatomic particle with the same mass as a proton but without an electric charge.
A stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal that of an electron.
An Atomic Mass Unit defined as precisely 1/12 of an atom of carbon-12 which has 6 protons and 6 neutrons. One AMU is the average of the rest mass of a proton and a neutron.
The outermost part of the atom surrounding the nucleus containing electrons.
a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing a single proton and a single electron.
is made up or consisting of several parts or elements.
a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with a similar atomic structure appear in columns.
the number of protons in the nucleus of an atom
the mass of an atom of a chemical element expressed in atomic mass units
olden-day ‘chemist’ who mixed chemicals and tried to change ordinary metals into gold. Alchemists also tried to tell the future.
the activity aimed at finding information
information obtained by the use of our senses or measuring instruments
people skilled in or working in the fields of science; scientists use experiments to find out about the material world around them