Ocr Gcse Chemistry C2

enthalpy – change in heat at constant pressure
Solvent – in a solution, the substance in which the solute dissolves

quantum – The discrete, minimum amount of energy involved in an interaction.
Noble Gases – VIIIA family on the periodic chart
Very unreactive – require very special conditions to react
metalloid – semiconductor, similar to non-metals and metals
Radioactivity – disintegration of a nucleus into a more stable nucleus
Alkaline-Earth Metals – metallic elements in group 2 of the periodic table which are harder than the alkali metals and are also less reactive
Horseplay and practical jokes in the laboratory are always… – Prohibited
Dimensionless quantity – A quantity with no units
Test Tube Clamp/Tongs – Used to hold a test tube while heating
Which atom has the smallest number of neutrons?
liquid – the state of matter that has a definite volume but not a definite shape
Cancer antigen 125 (CA 125) is a tumor marker associated with:
a breast carcinoma
b colon cancer
c lung cancer
d ovarian and endometrial carcinoma – b colon cancer
Intensive Properties – independent of the amount of substance
Exact Number – A Number that has no uncertainty and thus does not limit the number of significant figures.
Core electron – the electrons that are NOT on the outermost shell
Which аtоm hаs the smаllest number оf neutrоns?
basic – can neutralise an acid.
hydrocarbon – n.碳氢化合物

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