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Author Question: Elements in Group 8A are known as the ________. A) halogens B) alkali metals C) alkaline earth ... (Read 52 times)

WhattoUnderstand

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on: Aug 27, 2018
Elements in Group 8A are known as the ________.
 
  A) halogens
  B) alkali metals
  C) alkaline earth metals
  D) chalcogens
  E) noble gases

Question 2

Which one of the following elements has an allotrope that is produced in the upper atmosphere by lightning?
 
  A) N
  B) O
  C) S
  D) Cl
  E) He


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taylorsonier

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Reply #1 on: Aug 27, 2018
Answer to Question 1

E

Answer to Question 2

B


WhattoUnderstand

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Reply 2 on: Aug 27, 2018
Excellent

duy1981999

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Reply 3 on: Yesterday
:D TYSM

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