Which is a condition in which an element substitution could occur?
A) an ion is much larger than the one it will replace
B) an ion has a +4 charge, and it will replace an ion with a +3 charge
C) an ion has an equal charge to the one it will replace
D) an ion is much smaller than the one it ill replace
Question 2
Separating lead, copper, zinc, and iron from the sulfur atoms produces sulfuric acid as a by-product. Why is this a problem?
A) Sulfuric acid is useless and yields no profit.
B) Sulfuric acid, when released into the atmosphere, combines with vapor to produce acid rain.
C) Sulfuric acid is extremely profitable, but not in the form it is produced through this process.
D) Lead, copper, zinc and iron are wasted in producing sulfuric acid, which is more profitable.
The nurse needs to inform the patient with impaired vision when a touch is to occur and ask permissi
Hyperopia (farsightedness). In the uncorrected top figure, the image would come into focus behind th
Ectopic pregnancies. (a) An ectopic pregnancy may occur in any of the locations shown. Interstitial
Nephrolithiasis. Stones, or calculi, may form in several areas within the urinary tract. When they f
Bone fractures that occur before death show signs of healing. The process of fracture healing starts
The five skills of the element Collection of Information