This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: An atom of sodium has an atomic number of 11 and a mass of 23 . How many neutrons does it have? ... (Read 104 times)

HCHenry

  • Hero Member
  • *****
  • Posts: 591
on: Jul 27, 2018
An atom of sodium has an atomic number of 11 and a mass of 23 . How many neutrons does it have?
 
  a. 11
  b. 12
  c. 23
  d. 34
  e. 35

Question 2

Why is the ozone layer in Earth's atmosphere important to life on its surface?
 
  What will be an ideal response?


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

sierrahalpin

  • Sr. Member
  • ****
  • Posts: 329
Reply #1 on: Jul 27, 2018
Answer to Question 1

b

Answer to Question 2

The ozone layer in the upper atmosphere protects the lower atmosphere and Earth's surface from harmful solar UV photons.


HCHenry

  • Hero Member
  • *****
  • Posts: 591
Reply #2 on: Jul 27, 2018
Thank you!


sierrahalpin

  • Sr. Member
  • ****
  • Posts: 329
Reply #3 on: Jul 27, 2018
Always glad to help...


« previous next »
 

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

As of mid-2016, 18.2 million people were receiving advanced retroviral therapy (ART) worldwide. This represents between 43–50% of the 34–39.8 million people living with HIV.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates's recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Evaluation of a child for cystic fibrosis with a sweat chloride test. Sweat is being collected under Evaluation of a child for cystic fibrosis with a sweat chloride test. Sweat is being collected under
Sodium potassium pump Sodium potassium pump
Part A - Calculating the expected number of each phenotype Part A - Calculating the expected number of each phenotype
Conscientiousness is negatively correlated with a number of health-related behaviors. The higher the ... Conscientiousness is negatively correlated with a number of health-related behaviors. The higher the ...
A 31.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass ... A 31.1-g sample of Ne gas exerts a certain pressure in a container of fixed volume. What mass ...
Number of cells in the brain Number of cells in the brain
Video: What is Reverse Osmosis?

For a complete list of videos, visit our video library