Author Question: The halogens, alkali metals, and alkaline earth metals have ________ valence electrons, ... (Read 241 times)

s.tung

  • Hero Member
  • *****
  • Posts: 577
The halogens, alkali metals, and alkaline earth metals have ________ valence electrons, respectively.
 
  A) 7, 4, and 6
  B) 1, 5, and 7
  C) 8, 2, and 3
  D) 7, 1, and 2
  E) 2, 7, and 4

Question 2

Of the noble gases, ________ is present in highest concentration in dry air at sea level.
 
  A) Ne
  B) He
  C) Xe
  D) Kr
  E) Ar


bdobbins

  • Sr. Member
  • ****
  • Posts: 326
Answer to Question 1

D

Answer to Question 2

E



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Cutaneous mucormycosis is a rare fungal infection that has been fatal in at least 29% of cases, and in as many as 83% of cases, depending on the patient's health prior to infection. It has occurred often after natural disasters such as tornados, and early treatment is essential.

Did you know?

Approximately 500,000 babies are born each year in the United States to teenage mothers.

Did you know?

It is believed that humans initially contracted crabs from gorillas about 3 million years ago from either sleeping in gorilla nests or eating the apes.

Did you know?

About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.

Did you know?

As many as 28% of hospitalized patients requiring mechanical ventilators to help them breathe (for more than 48 hours) will develop ventilator-associated pneumonia. Current therapy involves intravenous antibiotics, but new antibiotics that can be inhaled (and more directly treat the infection) are being developed.

For a complete list of videos, visit our video library