Class 12 Exam  >  Class 12 Questions  >  X-ray studies show that the packing of atoms ... Start Learning for Free
X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.
Q.
The fraction occupied by metal atoms in the crystal is
  • a)
    0.52
  • b)
    0.68
  • c)
    0.74
  • d)
    1.0
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
X-ray studies show that the packing of atoms in a crystal of a metal i...
ρ = (Z × M)/(a3 × N× 10-30)
or a= (Z × M)/(ρ × N× 10-30)
For ccp, i.e., f.c.c., Z=4.
Hence,a= (4 × 197)/(19.4 × 6.02 × 1023 × 10-30)
= 6.747×107
= 67.47×106
or a = (67.47)1/3 × 102
= 4.07×102pm
= 407 pm
Free Test
Community Answer
X-ray studies show that the packing of atoms in a crystal of a metal i...
ρ = (Z × M)/(a3 × N× 10-30)
or a= (Z × M)/(ρ × N× 10-30)
For ccp, i.e., f.c.c., Z=4.
Hence,a= (4 × 197)/(19.4 × 6.02 × 1023 × 10-30)
= 6.747×107
= 67.47×106
or a = (67.47)1/3 × 102
= 4.07×102pm
= 407 pm
Explore Courses for Class 12 exam

Similar Class 12 Doubts

Directions:Read the below case and answer the questions that follow:The evidence for hereditary influences on intelligence comes mainly from studies on twins and adopted children. The intelligence of identical twins reared together correlate almost 0.90. Twins separated early in childhood also show considerable similarity in their intellectual, personality and behavioural characteristics. The intelligence of identical twins reared in different environments correlate 0.72, those of fraternal twins reared together correlate almost 0.60, and those of brothers and sisters reared together correlate about 0.50, while siblings reared apart correlate about 0.25. Another line of evidence comes from the studies of adopted children, which shows that children’s intelligence is more similar to their biological rather than adoptive parents. With respect to the role of environment, studies have reported that as children grow in age, their intelligence level tends to move closer to that of their adoptive parents. Children from disadvantaged homes adopted into families with higher socioeconomic status exhibit a large increase in their intelligence scores. There is evidence that environmental deprivation lowers intelligence while rich nutrition, good family background, and quality schooling increases intelligence. There is a general consensus among psychologists that intelligence is a product of complex interaction of heredity (natur e) and environment (nurture). Heredity can best be viewed as something that sets a range within which an individual’s developmentis actually shaped by the support and opportunities of the environment.Q. What type of children are studied for this analysis?

X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer?
Question Description
X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer?.
Solutions for X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12. Download more important topics, notes, lectures and mock test series for Class 12 Exam by signing up for free.
Here you can find the meaning of X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer?, a detailed solution for X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? has been provided alongside types of X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice X-ray studies show that the packing of atoms in a crystal of a metal is found to be in layers such that starting from any layer, every fourth layer is exactly identical. The density of the metal is found to be 19.4 g cm–2 and its atomic mass is 197 u.Q.The fraction occupied by metal atoms in the crystal isa)0.52b)0.68c)0.74d)1.0Correct answer is option 'A'. Can you explain this answer? tests, examples and also practice Class 12 tests.
Explore Courses for Class 12 exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev