Author Question: How many valence electrons do each of the following elements have? (Read 797 times)

scienceeasy

  • Hero Member
  • *****
  • Posts: 565
How many valence electrons do each of the following elements have?
A) C     B) S     C) K    D) I    E) B



folubunmi

  • Hero Member
  • *****
  • Posts: 524
A)4

B) 6

C) 1

D) 7

E) 3

You can tell by how far along they are in the table. It is easy to see in the first few rows, but harder to tell later on. However, the elements beneath the top elements follow the same trend.

Fluorine, for instance, is the 7th element of 8 in the second row. Therefore, it has 7 valence electrons. Iodine, I, which is in the same period also has 7 valence electrons.

Carbon has 4 because it's the 4th one in the row.

K, potassium, has 1 because it's in the first period.

B, Boron, has 3 because it's in the "3rd period." (not including the transition metals)

S, Sulfur, has 6 because it's in the "6th period" (yet again skipping the transition metals will help you tell how many valence electrons it has).



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

acc299

  • Hero Member
  • *****
  • Posts: 569
Carbon-4
Sulphur-6
Potassium-1
Boron-3
Iodine-7



 

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.

Did you know?

The first-known contraceptive was crocodile dung, used in Egypt in 2000 BC. Condoms were also reportedly used, made of animal bladders or intestines.

Did you know?

In the United States, an estimated 50 million unnecessary antibiotics are prescribed for viral respiratory infections.

For a complete list of videos, visit our video library