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When a Metal and acid react together they form a salt, and hydrogen gas. You can't really see the salt when is is formed, as salts dissolve in solution. However you can see the hydrogen gas bubbles. So fi...
Moving down a group means that the shielding of the outer electrons is increased due to the greater number of inner electron shells within the atom - these are between the nucleus and the outer electrons....
Covalent molecules come in all shapes and sizes, depending on pairs of electrons in the outer shell, which repel each other due to their negative charge....
The first ionisation energy is defined as the energy required to remove one mole of electrons from each atom of a mole of gaseous atoms. As we go along a period in the periodic table, the atomic number in...
This question uses the ideal gas equation. pV = nRT where the temperature is in Kelvin, the pressure in pascals and the volume in m3. To obtain the number of moles the equation is rearranged to give p = n...
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