究竟哪一個才是最具權威的世界大學排名？
關于大學排名信息不實早已不是鮮見的新聞，每一次各大世界大學排行榜一發布，總是會引發各路人士激烈的討論。有人樂于分享自己學校的好成績，也有人怒于聲討和質疑排名的準確性。那這五花八門的各大排行榜單中，...
IB DP Chemistry: HL復習筆記13.1.4 Catalytic & Magnetic Properties
Catalytic Properties Transition metals are often used as?catalysts?in the elemental form or as compounds The ability of transition metals to form more than one stable oxidation state means that the...
IB DP Chemistry: HL復習筆記13.1.3 Complex Ions
Complex Ions Transition element ions can form complexes which consist of a?central metal ion?and?ligands A ligand is a molecule or ion that forms a co-ordinate bond with a transition metal by donat...
認可度相對較高的國際競賽有哪些？
許多學生一聽到比賽就感到非常害怕，所以今天我們將幫助你整理5個部分的10個比賽，非常適合進入比賽，這些比賽有強大的認可，在國際知名度和認可度相對較高，可以說“性價比”超高了！認可度相對較高的國際學術活動...
IB DP Chemistry: HL復習筆記13.1.2 Variable Oxidation States
Variable Oxidation States When transition elements forms ions they lose electrons from the?4s?subshell first This is because when the orbitals are occupied, the repulsion between electrons pushes t...
IB DP Chemistry: HL復習筆記13.1.1 Transition Elements
Transition Elements Transition metals are elements with an incomplete d-subshell or that can form at least one stable cation with an incomplete d-subshell This definition distinguishes them from d-...
IB DP Chemistry: HL復習筆記12.1.2 Ionisation Energy Trends
Trends Across a Period Ionisation energies show?periodicity?– a trend across a period of the Periodic Table As could be expected from their electron configuration, the group 1 metals have a relativ...
IB DP Chemistry: HL復習筆記12.1.1 Emission Spectra & First Ionisation Energy
Convergence Limits on an Emission Spectrum Emission Spectra Electrons move rapidly around the nucleus in energy shells Heat or electricity can be used to excite an electron to a higher main energy ...
IB DP Chemistry: HL復習筆記11.2.6 Analysing Graphs
Analysing Graphs The?gradient?of a graph can be found by: In the case of a straight line graph: using a triangle and the equation for a straight line In the case of a curve: drawing a?tangent?to th...
IB DP Chemistry: HL復習筆記11.2.5 Drawing Graphs
Drawing Graphs General guidance on drawing graphs Graphs need to have: Clear title Labelled axes Units on the axes Appropriate linear scales without any jumps This means the plotted graph must occu...
IB DP Chemistry: HL復習筆記11.2.4 Percentage Error
Percentage Error Percentage error?is used to express the difference between a final calculated answer and an accepted or literature value It is calculated using the following formula You should be ...
IB DP Chemistry: HL復習筆記11.2.3 Reducing the Impact of Errors
Reducing Errors Random errors?can be reduced by repeated trials and measurements Multiple measurements when averaged will reduce the impact of a?random error?on the average The more readings you ha...
