Flashcards
Periodic Table
Cards in this deck (34)
- 1Atomic NumberAn integer that identifies an element uniquely; equal to the number of protons in an atom's nucleus
- 2Mass NumberThe sum of the number of neutrons and protons in an atomic nucleus
- 3ElementA substance that cannot be broken down into simpler substances by chemical means
- 4MoleculeA particle consisting of two or more atoms chemically combined
- 5CompoundA substance consisting of two or more different elements chemically combined in a fixed ratio
- 6ProtonA particle in the nucleus of an atom that has a positive charge
- 7NeutronA particle in the nucleus of an atom that has a neutral charge
- 8ElectronNegatively charged particle that orbits the nucleus of an atom
- 9NucleusThe small, dense, central region of an atom consisting of protons and neutrons
- 10NucleiPlural of nucleus
- 11NuclearRelating to the atomic nucleus
- 12NucleonAny particle found inside the nucleus i.e. protons and neutrons
- 13DaltonThe scientist who proposed that atoms were hard and indivisible spheres
- 14ThomsonThe scientist who proposed the “Plum Pudding” model of the atom, where the electrons are embedded in a positive matrix
- 15RutherfordThe scientist who determined via his gold foil experiment that atoms are mostly empty space with a dense positive nucleus that has electrons around it
- 16BohrThe scientist who improved on the Rutherford model by determining that electrons only existed in allowable energy levels (shells)
- 17GroupA vertical column of the Periodic Table where each element has similar chemical properties
- 18PeriodA horizontal row of the Periodic Table
- 19Alkali MetalThe elements found in Group I of the Periodic Table
- 20Alkaline Earth MetalThe elements found in Group II of the Periodic Table
- 21HalogenThe elements found in Group VII of the Periodic Table
- 22Noble/Inert GasThe gases in Group VIII of the Periodic Table. They are not chemically reactive as they have a full outer shell of electrons
- 23IonA charged particle formed by the loss or gain of electrons
- 24Polyatomic IonA charged particle consisting of many atoms
- 25ValencyA measure of the combining power of a particle with other atoms when it forms chemical compounds or molecules
- 26Electron ConfigurationA shorthand form of describing the ordered arrangement of a particle’s electrons into defined energy levels (shells).
- 27Covalent BondA type of chemical bond that involves the sharing of electron pairs between atoms
- 28Ionic BondA type of chemical bond that involves the electrostatic attraction between oppositely charged ions
- 29IsotopeAtoms of the same element containing different numbers of neutrons
- 30RadioactiveA substance that undergoes decay by a nuclear reaction to become more stable
- 31RadioisotopeAn isotope of an element that has an unstable nucleus and emits radiation during its decay to a stable form
- 32Alpha (α) ParticleA particle consisting of two protons and two neutrons bound together; identical to a helium nucleus
- 33Beta (β) ParticleA high energy electron ejected from the nucleus during β radioactive decay. This electron is formed by the decay of a neutron into a proton and an electron.
- 34Gamma (γ) RadiationThe highest energy radiation on the electromagnetic spectrum. Released by some radioactive nuclei after alpha or beta decay has already occurred.
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- Science yr9 (Periodic Table) Flashcards on Periodic Table, created by Mahisha Sathialingham on 06/08/2017.
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- Mahisha Sathialingham
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