Electron Orbitals Each shell can be divided further into?subshells,?labelled?s, p, d and f Each subshell can hold a specific number of orbitals: s subshell : 1 orbital p subshell : 3 orbitals label...
Electron Energy Levels Shells The arrangement of electrons in an atom is called the?electronic?configuration Electrons are arranged around the nucleus in?principal energy levels?or?principal quantu...
Emission Spectra Electrons move rapidly around the nucleus in energy shells If their energy is increased, then they can jump to a higher energy level The process is reversible, so electrons can ret...
The Electromagnetic Spectrum The?electromagnetic spectrum?is a range of?frequencies?that covers all electromagnetic radiation and their respective?wavelengths?and?energy It is divided into bands or...
Relative Atomic Mass Calculations Isotopes?are different atoms of the?same?element?that contain the?same number of protons?and electrons but a?different number of neutrons These are atoms of the sa...
Atoms: Key Terms The?atomic number?(or?proton number) is the number of protons in the nucleus of an atom and has the?symbol?Z The atomic number is also equal to the number of electrons that are pre...
Mass & Charge Distribution The mass of an atom is?concentrated?in the nucleus, because the nucleus contains the heaviest subatomic particles (the neutrons and protons) The mass of the electron ...
Titrations Volumetric analysis?is a process that uses the volume and concentration of one chemical reactant (a standard solution) to determine the concentration of another unknown solution The tech...
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疫情下中國學(xué)生IB DP大考成績有何變化？ 近日，IBO官網(wǎng)公布了全球173878名學(xué)生在今年5月份進行的IB考試成績，這其中包含IBDP（高中文憑課程）和IBCP（職業(yè)教育）兩種課程。資料顯示，今年IB DP全球平均分31.98分...
