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Lead forms metallic bond where only p-electrons are delocalized and move between the metal ions in the crystal lattice. This metal has a face-centered cubic structure. Exposure of lead to moist air leads to the formation of a protective layer on its surface - e.g. oxide, carbonate.
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When potassium metal is added to water, it react violently, but when potassium react with methanol, it forms bubbles. Why is this happening? why is potassium more reactive in water than in methanol
The molten metal spreads over the water and exposes a larger surface to water. Also, the hydrated radius of lithium is the greatest out of all alkali metals. This reduces...
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lead metal is obtained from lead sulphide through the following rection: 2PbS + 2C + 3O-2Pb + 2CO+2SO calculate mass oxygen is needed tu produce 500g of lead metal
Molar mass of Pb= 207.2g500/207.2= 2.413Mole ratio Pb:O2= 2:3Molar mass of O2= 31.998= 31.998×2.413×3/2= 115.823g
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Write an equation to represent the decomposition of lead (IV) sulfide into lead metal and solid sulfur. What is reduced? What is oxidized?
PbS = Pb + SPb+2 converts into Pb0 - it is reducedS-2 converts into S0 - it is oxidized
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*The whole Decay Series of -Uranium-238 -Actinium-227 -Thorium-232 To "Lead-207 "Lead-208 "Lead-209 Respectively
Radioactive decay (also known as nuclear decay, radioactivity, radioactive disintegration or nuclear disintegration) is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable...
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Are Group 3A elements more reactive than 4A?
Is Fe Zn Cu more reactive
How can you tell by looking at the periodic table?
There are two main characteristics determining the chemical reactivity: ionization energy for metals and electronegativity for non-metals. Ionization energy is increasing from left to right in a period and decreasing...
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A lead atom has a mass of 3.4 x 10 g neg 22 power. How many lead atoms are in a cube of lead that has a volume of 7.00cm to the 3rd power if the density of lead is 11.3g/cm to the 3rd power
1 . ᵽ = m/V, m = ᵽ * V m = 7*11,3 = 79,1g 2 . N = m/ma = 79,1/34*10⁻²² = 23,265*10²²
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Complete the following sentences:
When metals react with other substances the metal atoms form..........
The more reactive the metal is the better it is at forming......... ..............
Complete the following sentences: When metals react with other substances the metal atoms form cations The more reactive the metal is the better it is at forming salts because it...
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lead (II) sulfide has a composition of 86.6% lead and 13.4% sulfur . if 10.5 g of lead reacts to form lead (II) sulfide . What mass of sulfur reacts?
86.6/201:13.4/32=1:1.PbS.Pb+S=PbS.(10.5/201) x 32= 1.67164179 g of S
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Which of the above equilibria is forced to shift furthest to the left? Explain.
- Lead nitrate and Sodium chloride
- Lead chloride and Sodium chromate
-Lead chromate and Sodium sulphide
Answer: Combination which makes less soluble product shift towards left side of the equation.Pb(NO3)2 + 2NaCl = PbCl2 + 2NaNO3PbCl2 + Na2CrO4 = PbCrO4 + 2NaClPbCrO4 + Na2S = PbS...
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the denisty of lead metal is 11.35 g/cm3 if 16.44 g of lead metal is placed in 10 ml graduated cylinder that contains 4.0 ml water what will be the final volume of water in the cylinder
Volume of the metal = mass/densityVolume of the metal = 16.44/ 11.35 = 1.45 mLFinal volume in the cylinder = volume of the metal + volume of waterFinal volume in...
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