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Group 2, the alkaline earth metals key terms
Study Group 2, the alkaline earth metals with curriculum-aligned Key Terms resources, practice links, and exam-focused support.
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key terms
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Topic
Group 2, the alkaline earth metals
Key terms
Atomic radius
The distance from the nucleus of an atom to the outermost electron shell.
Ionisation energy
The energy required to remove one mole of electrons from one mole of gaseous atoms.
Alkaline Earth Metals
The elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
Hydroxide
A chemical compound containing the hydroxide ion (OH−), formed when Group 2 metals react with water.
Ionization Energy
The energy required to remove an electron from an atom in the gas phase.
Alkaline Earth Metals
The elements in Group 2 of the periodic table, including beryllium, magnesium, calcium, strontium, barium, and radium.
Lattice enthalpy
The energy required to separate one mole of a solid ionic compound into its gaseous ions.
Hydration enthalpy
The energy change when one mole of gaseous ions is dissolved in water.
Insoluble
A substance that does not dissolve in a solvent, such as water.
Radiocontrast agent
A substance used in medical imaging to enhance the contrast of structures or fluids within the body.
Neutralization
A chemical reaction in which an acid and a base react to form water and a salt.
pH
A measure of the acidity or alkalinity of a solution, on a scale of 0 to 14.
Lattice energy
The energy required to separate one mole of a solid ionic compound into its gaseous ions.
Hydroxide solubility
The ability of hydroxides of Group 2 metals to dissolve in water, increasing down the group.
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