Flashcards
Atomic structure and the periodic table revision flash cards
Cards in this deck (30)
- 1Alkali metalsthe elements in group 1 of the periodic table.
- 2Atomthe smallest part of an element that can exist. all substances are made up of atoms
- 3Atomic nucleusPositively charged object composed of protons and neutrons at the centre
of every atom with one or more electrons orbiting it. - 4Atomic numberthe number of protons in the nucleus
- 5chromatographyA separation technique used to separate a mixture of chemicals by
distributing the components between two phases. - 6CompoundA substance made up of two or more types of atoms chemically combined
together. - 7crystallisationA separation technique used to produce solid crystals from a solution by
evaporating the solvent. - 8DisplacementA chemical reaction in which a more reactive element displaces a less
reactive element from its compound. - 9ElectronNegatively charged subatomic particle which orbit the nucleus at various energy
levels. Very small relative mass - 10Electron shellDifferent energy levels in atoms occupied by electrons.
- 11ElementA substance made up of only one type of atom.
- 12FiltrationA separation technique used to separate solids from liquids.
- 13Fractional distillationA method of separating a mixture of substances according to their
different boiling points. - 14Group in the periodic tableThe columns of the periodic table represent different groups of
elements. Elements with similar properties are in the same group. - 15HalogensThe elements in Group 7 of the periodic table.
- 16IonAn atom or molecule with an electric charge due to the loss or gain of electrons.
- 17IsotopeAtoms of the same element with the same number of protons but a different number
of neutrons. - 18Mass numberThe total number of protons and neutrons in the nucleus.
- 19MetalsElements that react to form positive ions. Found to the left and towards the bottom of
the periodic table. - 20MixtureA mixture consists of two or more elements or compounds not chemically combined
together. - 21NeutronNeutral subatomic particle present in the nucleus of the atom. Relative mass of 1.
- 22Noble gasesThe elements in Group 0 of the periodic table
- 23Non-metalsElements that react to form negative ions. Found towards the right and top of
the periodic table. - 24Nuclear modelThe nuclear atomic model stated that the mass was concentrated at the
centre of the atom and that the nucleus was charged. - 25periodic tableTable of elements arranged in order of atomic number and such that
elements with similar properties are in the same column (group). - 26Plum pudding modelAtomic model devised after the discovery of the electron. The model
suggests the atom is a ball of positive charge with negative electrons scattered through it. - 27ProtonPositively charged subatomic particle present in the nucleus of the atom. Relative
mass of 1. - 28Relative atomic massAn average value that takes account of the abundance of the
isotopes of the element. - 29Simple distillationA procedure by which two liquids with different boiling points can be
separated. - 30Transition metalsThe collection of metallic elements in the middle of the periodic table.