Astatine has a(n) ________ density and a(n) ________ atomic ...

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Astatine has a(n) ________ density and a(n) ________ atomic radius compared to iodine.
 
  A) greater; greater
  B) smaller; greater
  C) smaller; smaller
  D) greater; smaller
  E) equal; equal

Question 2

Under appropriate conditions, nitrogen and hydrogen undergo a combination reaction to yield ammonia: N2 (g) + 3H2 (g)  2NH3 (g) If the reaction yield is 87.5, how many moles of N2 are needed to produce 3.00 mol of NH3?
 
  A) 0.166
  B) 1.00
  C) 1.5
  D) 1.71
  E) 2.32

Question 3

What is the formula of the compound formed between strontium ions and nitrogen ions?
 
  A) SrN
  B) Sr3N2
  C) Sr2N3
  D) SrN2
  E) SrN3

[EAN94]

Answer to Question 1

A

Answer to Question 2

D

Answer to Question 3

B

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[EAN94]

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