Flashcards
Science- Chemistry
Cards in this deck (14)
- 1AtomsThe particles that make up all materials; the smallest part of an element that can take part in a chemical reaction.
- 2MoleculesDiscrete groupings of atoms covalently bonded together.
- 3Ions'Charged atoms' (or groups of atoms) formed by electrons being transferred from one atom to the other.
- 4ElementA substance composed of atoms with the same atomic number; 118 are known to exist.
- 5ProtonsA stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron.
- 6NeutronsA subatomic particle of about the same mass as a proton but without an electric charge, present in all atomic nuclei except those of ordinary hydrogen.
- 7ElectronsA stable subatomic particle with a charge of negative electricity, found in all atoms and acting as the primary carrier of electricity in solids.
- 8NucleusHeavy core at the centre of the atom, made of protons and neutrons.
- 9Electron shellAlso known as energy levels, the regions surrounding the nucleus where electrons may be found.
- 10Valence ShellThe outermost shell of electrons in an atom; these electrons take part in bonding with other atoms
- 11GroupVertical columns of the periodic table; group number is equal to the number of electrons in the outer shell of atoms of the elements in that group.
- 12PeriodHorizontal rows of the periodic table; period number of an element is equal to the number of electron shells.
- 13CompoundA thing that is composed of two or more separate elements; a mixture.
- 14MixturesA substance made by mixing other substances together.