Question

Which one of the bonds: lonic, covalent, metallic, and Van der Waal doesn't involve electron sharing or transfer, and called secondary bonding? Ans: Charge on an electron is -1.6 x 10°C. What does C stand for? Ans: Fill in the blanks in questions with 3. than in its Isotope of an element has a greater number of nucleus. A proton or a neutron has a mass equal to 1.66 x 10-24g, this mass is also called -. If 1.66 x 10-24g = 1 amu => 1g=- = 6.023x1023 amu. This number 6.023x 1023 is called 6.023 x 1025 atoms of an element is called gram-atom of that element and has mass equal to (protons + neutrons) g. Therefore 6.023x10- atoms Chas mass In notations 1s, 2s, 2p, 35, 3p, 3d,......etc, the numbers 1, 2, 3,..indicate and letters s, p, d, findicate 7. lonic bond results due to attraction between two ions that resulted due to electron transfer. True or False? Questions: () In the vicinity of a = do the bond acts like a spring, it opposes external forces. Can you think of an important consequence of it? Hint (you know it from lecture 1).

Answer 1

1. Van der Waal bond

2. Coulombs

4. Atomic mass unit & Avagadro's Number

5. 14 amu

6. Energy level & types of orbitals

Secondary bonding - Van der waal bond : It alours due to forces produced by atomie o nolemlar dipoles which are produced by random fluctuations of elections around electrically symmetric atons (cot fet) Didered dipole 1st atin Reendom cipole on seund atero 2. Charge on an electrons is – 1.6x10th c. What dues c stands. Coulombs - -24 4. A porton or reution has a mass equal to lobbxo g. this mass in also called Atomie mass unit. If m 93 - 24 libb x 10 g = lamu > lg anu. - --6.023 x lo lobbxo24 Aragadoo's Number This number in called (6.) In notations 15, Q5, 28, 35, 31, 3d. etc, the numbers 1,2,3... indicate energy level and letters S.p.dif indicate type of orbitals. (6 6,023 x ²3 atoms of an element in called gram atom of that element and has mass equal to Cetn). 6.023 xw²s atoms 14C has man = - 8. Carbon - 14 (14 c) = 14 amu.