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

Author Question: Elements in the same group have A) the same atomic number. B) the same number of neutrons. C) ... (Read 97 times)

craiczarry

  • Hero Member
  • *****
  • Posts: 527
on: Aug 27, 2018
Elements in the same group have
 
  A) the same atomic number.
  B) the same number of neutrons.
  C) the same number of electrons.
  D) the same number of valence electrons.

Question 2

If the half-life of an isotope is 5 hr, the amount of 20.0 g remaining after 15 hr will be ________.
 
  A) 2.5 g
  B) 5.0 g
  C) 6.67 g
  D) 10.0 g


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

amandanbreshears

  • Sr. Member
  • ****
  • Posts: 320
Reply #1 on: Aug 27, 2018
Answer to Question 1

D

Answer to Question 2

A


craiczarry

  • Member
  • Posts: 527
Reply 2 on: Aug 27, 2018
Thanks for the timely response, appreciate it

ttt030911

  • Member
  • Posts: 315
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.

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?

For high blood pressure (hypertension), a new class of drug, called a vasopeptidase blocker (inhibitor), has been developed. It decreases blood pressure by simultaneously dilating the peripheral arteries and increasing the body's loss of salt.

Did you know?

According to research, pregnant women tend to eat more if carrying a baby boy. Male fetuses may secrete a chemical that stimulates their mothers to step up her energy intake.

Did you know?

When taking monoamine oxidase inhibitors, people should avoid a variety of foods, which include alcoholic beverages, bean curd, broad (fava) bean pods, cheese, fish, ginseng, protein extracts, meat, sauerkraut, shrimp paste, soups, and yeast.

Some mangrove islands in the Florida Keys, which number in the thousands, are convenient places to t Some mangrove islands in the Florida Keys, which number in the thousands, are convenient places to t
The heme group viewed from the side. This view shows the two coordination bonds to Fe2+ The heme group viewed from the side. This view shows the two coordination bonds to Fe2+
skeletal muscle consists of a group of fibers held together by connective tissue. It is enclosed in ... skeletal muscle consists of a group of fibers held together by connective tissue. It is enclosed in ...
Group Size Group Size
How to find the average atomic mass of an element How to find the average atomic mass of an element
The potential involvement of colchicine in doubling the chromosome number The potential involvement of colchicine in doubling the chromosome number
Video: Subunits of DNA And Semi Conservative Replication

For a complete list of videos, visit our video library