Describe and explain the periodic trends of the period 3 elements Na - Ar

Properties of the elements of stream 3 (Na - Ar) to illustrate the hebdomadary trends What is cyclicity? cyclicity is the repeating pattern in which the elements are arranged in the periodic table, these are some of the trends shown from looking at the periodicity of the elements. Atomic radius An subdivision doesnt have a dogged radius. The radius of an atom washstand only be institute by measuring the outdistance betwixt the nuclei of two despicable atoms, and then halving that distance. Atomic radius is measured in nm. The graph shows that atomic radius decreases across a period (from odd to right). This is because the number of protons in the centre increases so the nuclear redden increases. The force of loss leader between the nucleus and the electrons increases so the electrons are drawn much tightly to the nucleus so the size of the atom (and the atomic nucleus) decreases. The atomic radius of argon cannot be measured because it is a appal ling gas so doesnt form bonds. eldest ionisation life force The premier ionisation energy is the energy required to remove the around generally held electron from one mole of gaseous atoms to drive 1 mole of gaseous singly charged controlling ions. Ionisation energy is measured in Kjmol.

M(g) ----------- M+(g) + e- First ionisation energy increases across a period because liberation across the period the number of protons in the nucleus increases so the nuclear charge in each element increases so the force of attraction between the nucleus and satellite electron is increased, and there is a negligible increase in screen because ea! ch concomitant electron enters the same energy direct so more energy is needed to remove the outer electron. Some anomalies occur in this graph and other graphs of for the first time ionisation energy. The Anomaly in this graph between... If you want to lounge about a full essay, tack together it on our website: BestEssayCheap.com

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