ahmedabudief

Dr. Ahmed Mohamed Abu-Dief

Professor - Professor of Physical and Inorganic Chemistry

Faculty of science

Address: Behind hospital of Sohag University - Ali Ebn Abi Taleb Street

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Base
In the Bronsted-Lowry system, a base is defined as: (a) a proton donor. (b) a hydroxide donor. (c) an electron-pair acceptor. (d) a water-former. (e) a proton acceptor. Read more

Acids
Arrhenius defined an acid as: (a) a species that can donate a proton. (b) a species that can accept a proton. (c) a source of OH- ions in water. (d) a sourse of H+ ions in water. (e) a species that can accept a pair of electron Read more

Chmeical bonding2
Consider the bicarbonate ion (also called the hydrogen carbonate ion). After drawing the correct Lewis dot structure(s), you would see: (a) two double bonds around the central carbon atom. (b) three single bonds around the central carbon atom. (c) four single bonds around the central carbon atom. (d) two equivalent resonance forms. (e) three equivalent resonance forms. Read more

Chmeical bonding1
Which is classified as nonpolar covalent? (a) the H-I bond in HI (b) the H-S bond in H2S (c) the P-Cl bond in PCl3 (d) the N-Cl bond in NCl3 (e) the N-H bond in NH3 Read more

Chmeical bonding
1.The valence electrons of representative elements are (a) in s orbitals only. (b) located in the outermost occupied major energy level. (c) located closest to the nucleus. (d) located in d orbitals. (e) located in the innermost occupied shell. Read more

Denisty
Wriite a brief Account on density and its onceptions? Read more

Signifcant Figures
Write short notes on significant figures , measurments of volume,burete techniqe, wighting ? Read more

2020-04-12 19:53:56 | 69 | Selected topics in physical chemistry
Types of Decay
Show Various Types of Radioactive Processes Showing the Changes That Take Place in the Nuclides? Read more

2020-04-12 19:43:11 | 64 | Selected topics in physical chemistry
Prediction the mode of decay
Predict the mode of decay of (a) carbon-14, (b) xenon-118 Read more

2020-04-12 19:32:40 | 60 | Selected topics in physical chemistry
Predicting Nuclear Stability
Predict which of these nuclei are especially stable: 2He4, 20Ca40, 43Tc98? Read more