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1. Tomorrow I will visit my brother in Madrid.2) Hoy he visto un perro y ayer vi un gato.

As you descend group 1, there is an increasing number of electron shells, therefore increasing the distance between the positive nucleus and the negative outer electron which decreases the attraction betw...

This is an example of ionic bonding, meaning that the cation (calcium) will lose electrons and the anion (chloride) will gain electrons so all ions will have a full outer shell.Calcium will form a 2+ ion,...

A key algebraic technique for double brackets is FOILx^2 -3x + 2x -6simplify furtherx^2 -x -6can check by factorisingthe integers adds to make "the number" and multiply to make "the x"...

A waterfall is an erosional landform found in the upper course of a river. Its formation starts as water flows over rock eroding downwards by hydraulic action and abrasion (and perhaps corrosion). Differe...