B: calcium
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Three different beakers are set up as shown. In beaker 1 metal W is displaced from solution. In beaker 2 metal X is d…
Equations for reactions of iron and iron compounds are shown. Fe + 2HCl → FeCl2 + H2 2FeCl2 + Cl2 → 2FeCl3 FeSO4 + Mg…
A metal M forms a chloride which dissolves in cold water and has an oxide which dissolves in both strong acids and st…
The diagram shows the structure of a covalent compound containing the element hydrogen, H, and the unknown elements X…
A metal consists of a lattice of positive ions in a 'sea of electrons'. What changes, if any, take place to the elect…
What is the mass of one mole of carbon-12?