OCR A level Chemistry

OCR A level Chemistry
Study online at https://quizlet.com/_9uqwbw

1. Electronegativity The tendancy of an atom to attract the bonding pair of electrons in a covalent bond

2. Radical A molecule, atom or ion with an unpaired electron

3. Acid (bronsted A molecule or atom that can donate a proton
lowry theory)

4. Base A molecule or atom which can act as a proton acceptor

5. Alkali A water soluble base

6. Standard Condi- 298 K, 100 kPa, 1 moldm^-3
tions

7. Standard en- The enthalpy change when equation quantities of reactants react under standard
thalpy change of conditions and in standard states.
a reaction (delta
H r)

8. Standard en- The enthalpy change when one mole of a compound is formed from its elements
thalpy change of under standard conditions and in standard states.
formation (delta
H f)

9. Standard en- The enthalpy change when one mole of a compound is burned completely in
thalpy change oxygen under standard conditions and in standard states.
of combustion
(delta H c)

10. Heterolytic fis- A bond breaks and both bonding electrons go to one atom/molecule. Two ions are
sion formed.

11. Homolytic fission A bond breks and each atom gainn s an electron. This produces 2 radicals.


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