Long Answer Type Questions 1. Name the elements of shortest period. 3. Sodium (Atomic. No. 11) readily forms ions whereas neon (Atomic. No. 10) des . Er Ilhat are the general trends in the properties of elements on moving from left to rigt An clement c'has the electronic configuration 2, 8, 8, 1. Without identifying, C: (iii) Write down the probable formula and appearance of the chloride of C. 5. Copy first the elements in List 1 then match their valencies in List 2 and their nature in Las (iv) State whether you would expect the element C to have oxidising or reducing properties (i) Predict the group and period of C: (ii) The sign and charge on a simple ion of c. List 2. List 3 A has atomic number 15 + 2 > - 1 alkaline earth halogen inert gas - 3 B/has electronic configuration 2, 8, 8 has neutrons 14, electrons 13 has 17 protons and 17 electrons has 2 electrons in its outermost shell .
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If a vibrating string is fastened to two points / apart, has an initial
velocity O then its boundary conditions are given by
(a) y (0, t) = 0 = y(2, t),ay = 0 at t = 0
at
(b) y (0, t) = 0 = y (1,0), a.
= 0 att = 0
(c) y (0, t) = 0 = y (L, t), ae
00 att = 0 d) None
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