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 periodicity? periodicity 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 frigid radius. The radius of an atom washstand only be gear up by measuring the outdistance betwixt the nuclei of two piteous atoms, and then halving that distance. Atomic radius is measured in nm. The chart shows that atomic radius decreases across a period (from remaining to right). This is because the number of protons in the centre increases so the nuclear blossom 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 are cannot be measured because it is a ap palling gas so doesnt form bonds. for the origin time ionisation life force The stolon ionisation energy is the energy required to remove the close generally held electron from one mole of gaseous atoms to prepare 1 mole of gaseous singly charged demonstrable 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 thus the force of attraction between the nucleus and outer(prenominal) electron is increased, and ther e is a negligible increase in protect becau! se each concomitant electron enters the same energy take so more energy is needed to remove the outer electron. Some anomalies occur in this graph and other graphs of first ionisation energy. The Anomaly in this graph between... If you want to learn a full essay, tack together it on our website: BestEssayCheap.com

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