valentina1725 valentina1725

26-03-2020
Chemistry

contestada

What is the product of the second alpha decay in this series
A) Pa-228
B)Ra-224
C)Th-224
D)U-232

Respuesta :

kerrbear2016 kerrbear2016

02-04-2020

In Alpha decay two neutrons and protons are lost, so the mass decreases by four and the atomic number decreases by two.

Therefore the correct answer is B: Ra-224.

Answer Link

Otras preguntas

Scotty is planning to order 1 cubic yard of topsoil for his 15' by 24' garden expecting that if evenly spread, he would end up with 2 inches of topsoil. Is he c

There are four activities on the critical path, and they have standard deviations of 1, 2, 4, and 2. what is the probability that the project will be completed

7x-12y=-32 what is the equation of a line parallel to the line shown

A situation in which participants act out the roles of others so that they can better understand those roles is called a. role-playing. b. on-the-job training.

According to anthropological ethics, the first responsibility of the anthropologist is to the people studied. a. True b. False

Which is the graph of f(x)=2(3)^x

Which undefined terms are needed to define a line segment

The io paradigm has been qualified by the potential for ________ to lead to a company's sustained competitive advantage.

Once you’ve chosen a topic, what should you do next?

Please help ASAP! Who organized The League of Women Voters? A) Bessie Smith B) Marian Anderson C) Carrie Chapman Catt D) Amelia Earhart