Christmas Exam Flashcards
Atomic number
No of protons in an atom of that same element
What is an electron
Subatomic particle, located in electron cloud of an atom
Orbital
Region of space within the nucleus of an atom with a high probability of finding an electron
Cathode rays
Streams of negatively charged rays called electrons
State One limitation of Arrhenius acid base theory
NH3 cannot be considered a base
Acid according to Arrhenius
Substance that dissociates in water to give protons
Acid according to bronsted Lowry
Proton donor
What is a conjugate pair
Two species that differ by a proton
Knocking
Results from petrol auto igniting
Octane number
Measure of a tendency of a fuel to resist knocking
Define heat of formation
Heat change when 1 mole of a substance is formed from its elements in their standard states
Define fractional distillation
Separation into components according to molecular size
Hess law
Heat change for a reaction depends only on initial and final states
Atomic theory
matter is composed of tiny, indivisible particles called atoms that can neither be created nor destroyed.
Why might an electron not occupy n= 1
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