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Q1. How the groups are numbered in modern periodic table?
Q2. How the groups were numbered in periodic table of American system of naming?
Q3. How the groups were numbered in periodic table of European system of naming?
Q4. Do the groups from 3-10 have any trivial names?
Q5. Which properties show pattern in periodic table?
Q6. How the atomic radii show variation from top to bottom?
Q7. How the ionization energy varies in moving down the group from top to bottom?
Q8. How the electronegativity varies in moving down the group from top to bottom?
Q9. What was the position of noble gases in original form of Mendeleev's periodic table?
Q10. What is the position of hydrogen element in the modern periodic table?
how many liters of o2 can be made from 342 g of h2o2?the density of h2o2 is 1.463gml and the density of o2 is 1.428 gl.
Three solutions are mixed together to form a single solution. One contains 0.2 mol Pb(CH3COO)2, the second contains 0.1 mol Na2S, and the third contains 0.1 mol CaCl2. Write the net ionic equations for the precipitation reaction or reactions that ..
molecular I2 dissociates into iodine atoms at 625 K with a first-order rate constant of 0.271 s-1. What is the half-life?
Combustion Analysis of Toluene, Combustion analysis of toluene, a compound containing carbon and hydrogen only, gives 5.86 mg carbon dioxide and 1.37 mg of water. What is its empirical formula?
Assuming the waste heat of the engine provides all the heat necessary to melt the iceberg, how much work can this do?
Silver nitrate reacts with ferric chloride to give silver chloride a ferric nitrate. In a particular expriment, it was planned to mix a solution .
What potential issues might arise if the pH of your buffer is too close to the pI of your protein of interest? Why might an extreme buffer pH ( 9) be unsuitable?
Question- Sodium metal has a crystal structure based on the body-centered cubic unit cell. What is the closest value to the mass of one unit cell of sodium metal
The element platinum has a solid-state structure in which platinum atoms are arranged in cubic shape that repeats throughout the solid. if the length of an edge of the cube is 392 pm (1 pm= 1 x 10^-12), what is the volume of the cube in meters
cyclohexane-toluene mixture, and then obtain IR spectra for each fraction. How would the IR spectrum of the first 1 mL fraction look different from that of the last 1 mL fraction?
how many moles of nitrogen gas will be formed upon the complete reaction of 31.6 grams of nitrogen monoxide with excess hydrogen gas?
The flue gases after that pass through a heat exchanger from which they emerge at 50°C. Per mole of methane, explain how much heat is lost from the furnace and how much heat is transferred in the heat exchanger
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