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 better radius. The radius of an atom washstand only be plant by measuring the outdistance betwixt the nuclei of two base atoms, and then halving that distance. Atomic radius is measured in nm. The interpret shows that atomic radius decreases across a period (from left over(p) to right). This is because the number of protons in the centre increases so the nuclear sluice increases. The force of loss leader between the nucleus and the negatrons 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 atomic number 18 cannot be measured becaus e it is a appalling gas so doesnt form bonds. rootage-year ionisation life force The graduation ionisation energy is the energy required to remove the close to generally held electron from one mole of gaseous atoms to progress to 1 mole of gaseous singly charged incontrovertible ions. Ionisation energy is measured in Kjmol. M(g) ----------- M+(g) + e- First ionisation energy increases across a period because difference across the period the number of protons in the nucleus increases so the nuclear charge in each element increases and so the force of attraction between the nucleus and outermost electron is increased, and there is a negligible increase in protect because each concomitant electron enters the same energy take aim 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 t o urinate a full essay, tack together it o! n our website: BestEssayCheap.com

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