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Alex_Xolod [135]
3 years ago
8

Q.2. How does the valency of elements vary in going down a group of the periodic table?​

Chemistry
1 answer:
Elan Coil [88]3 years ago
8 0

Answer:

The valency does not change going down a group since the bonding behavior is not affected by the core electrons.

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Write the formula for lead oxide.
serious [3.7K]

Answer:

<h2>Lead(II) oxide</h2>

Explanation:

<h3>Lead(II) oxide, also called lead monoxide, is the inorganic compound with the molecular formula PbO. PbO occurs in two polymorphs: litharge having a tetragonal crystal structure, and massicot having an orthorhombic crystal structure. Modern applications for PbO are mostly in lead-based industrial glass and industrial ceramics, including computer components. It is an amphoteric oxide.[3]</h3>

  • IUPAC name
  • Lead(II) oxide

  • Other names
  • Lead monoxide
  • Litharge
  • Massicot
  • Plumbous oxide
  • Galena

<h2> Preparation</h2><h3>PbO may be prepared by heating lead metal in air at approximately 600 °C (1,100 °F). At this temperature it is also the end product of oxidation of other oxides of lead in air:[4]</h3><h3>Thermal decomposition of lead(II) nitrate or lead(II) carbonate also results in the formation of PbO:</h3>

<h3>2 Pb(NO</h3><h3>3)</h3><h3>2 → 2 PbO + 4 NO</h3><h3>2 + O</h3><h3>2</h3><h3>PbCO</h3><h3>3 → PbO + CO2</h3><h3>PbO is produced on a large scale as an intermediate product in refining raw lead ores into metallic lead. The usual lead ore is galena (lead(II) sulfide). At a temperature of around 1,000 °C (1,800 °F) the sulfide is converted to the oxide:[5]</h3>

<h3>2 PbS + 3 O</h3><h3>2 → 2 PbO + 2 SO2</h3><h3>Metallic lead is obtained by reducing PbO with carbon monoxide at around 1,200 °C (2,200 °F):[6]</h3>

<h3>PbO + CO → Pb + CO2</h3>

pls brainlest meh

5 0
2 years ago
In a solution there is usually more ____________than ___________ A) solute/solvent B) soluble/insoluble C) saturation/unsaturati
Elan Coil [88]

Answer:

I think the answer is option 3

5 0
3 years ago
which is a type of heat transfer that causes the air at the top floor of a building to be hotter than the bottom floor of a buil
bonufazy [111]

Answer: I believe it's convection

Good luck and I hope this helps!!

8 0
3 years ago
What is the chemical formula of the salt produced by the neutralization of potassium hydroxide with sulfuric acid?
Novay_Z [31]
Hi my friend,
the salt produced is K2SO4
hope it helps.☺
4 0
3 years ago
PLZ HELP 20 POINTS
N76 [4]
I think is the letter B but i dont know if its right
4 0
3 years ago
Read 2 more answers
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