please your answers must be in details and chemistry related. thanks a lot.
2007-06-30 06:09:32 · 5 answers · asked by moi 2 in Science & Mathematics ➔ Chemistry
Alkali metals have one electron in the outermost (s) shell, removing this leaves a stable configuration, hence releases a lot of energy.
Halogens are one electron short in the outermost (p) shell, adding an electron creates a stable configuration, hence releases energy.
The further you go down the alkali metal series (lithium->Caesium) the further away from the nucleus is the outermost electron and the more electrons there are to shield it - hence it is even easier to detatch.
The further you go UP the halogen series (i.e. bromine->flourine) the closer the outer orbit is to the nucleus, hence the greater the attraction and hence the higher the 'electronegativity' of the halogen.
Thus the most reactive combination would be ceasium - flouride
(Ignoring Astatine / Francium as being outside your syllabus)
2007-06-30 08:22:49 · answer #1 · answered by welcome news 6 · 2⤊ 0⤋
Alkali Metals And Halogens
2016-10-30 06:01:11 · answer #2 · answered by muniz 4 · 0⤊ 0⤋
In both groups the radius of the atoms increases as you go down the group.
The alkali metals lose an outer electron. The further from the nucleus, the easier it is to lose, and so alkali metals get more reactive as you go down the group.
For the halogens, reactivity increases up the group because an electron is added, and the smaller the atom, the closer the added electron is to the nucleus and the stronger the attraction.
2007-06-30 06:21:53 · answer #3 · answered by Gervald F 7 · 0⤊ 0⤋
alkali metal found in group 1 lose 1 electron in there outer shell to gain to gagne a noble gas configuration
so that they become positively charged. their reactivity increase down the group so the most reactive is Fr
halogen found in group 7 are non metal. they must gain 1 electron in their outermost shell to gain noble gas configuration. so their charge become negative. contrary to the group 1 element their reactivity decreases down the group hence the most reactive is F
2007-06-30 06:28:00 · answer #4 · answered by Amy 2 · 0⤊ 0⤋
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RE:
explain reactivity of alkali metals and halogens on a periodic table in terms of gaining or losing electrons?
please your answers must be in details and chemistry related. thanks a lot.
2015-08-19 16:23:31 · answer #5 · answered by ? 1 · 0⤊ 0⤋
Alkali metals are in group one , alkali earth group two . Halogens are group 17 & nobale gasses are group 18
2016-03-19 01:23:05 · answer #6 · answered by Ruth 3 · 0⤊ 0⤋
alkali metals lose electron and will get +charge but halogens gain electrons and get - charge
2007-06-30 06:14:42 · answer #7 · answered by ***** * 1 · 0⤊ 1⤋