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 126 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?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

More than one-third of adult Americans are obese. Diseases that kill the largest number of people annually, such as heart disease, cancer, diabetes, stroke, and hypertension, can be attributed to diet.

Did you know?

Approximately one in three babies in the United States is now delivered by cesarean section. The number of cesarean sections in the United States has risen 46% since 1996.

Did you know?

Automated pill dispensing systems have alarms to alert patients when the correct dosing time has arrived. Most systems work with many varieties of medications, so patients who are taking a variety of drugs can still be in control of their dose regimen.

Did you know?

About one in five American adults and teenagers have had a genital herpes infection—and most of them don't know it. People with genital herpes have at least twice the risk of becoming infected with HIV if exposed to it than those people who do not have genital herpes.

Hydrogen Atom Hydrogen Atom
sodium sodium
Atom formation Atom formation
A model for the operation of voltage-gated sodium channels. A model for the operation of voltage-gated sodium channels.
An empty spice bottle has an inner volume of 1.31 10-4 m3 . It has a mass of 112 g when filled ... An empty spice bottle has an inner volume of 1.31 10-4 m3 . It has a mass of 112 g when filled ...
Locate the following places by reference number on the map:Key Locales of Political, Economic, ... Locate the following places by reference number on the map:Key Locales of Political, Economic, ...
Video: The primary factors that affect circulation - MABP, CO and SVR

For a complete list of videos, visit our video library