![subject](/tpl/images/cats/himiya.png)
The mystery of periodic law was solved when proposed his planetary atomic model of the atom, providing an understanding of the electronic structure of the elements and the organization of electrons into shells. a) bohr b) rutherford c) heisenberg d) schrödinger chris the chemist was working in the lab, and he wanted to see what would happen if he put copper chloride into a bunsen burner flame. as soon as he put it in the flame, it began to emit a green color. which of these best describes this outcome? a) the heat split the nucleus and created a new element. b) as the copper chloride was heated, electrons were turned into neutrons. c) as the electrons moved to a higher energy level, a photon of light is emitted. d) when excited electrons return back to the ground state, a photon of light is emitted. boron has two naturally-ocurring isotopes. boron-10 has an abundance of 19.8% and actual mass of 10.013 amu, and boron-11 has an abundance of 80.2% and actual mass of 11.009 amu. what is the average atomic mass for all isotopes of boron? a) 10.0 amu b) 10.5 amu c) 10.511 amu d) 10.812 amu
![ansver](/tpl/images/cats/User.png)
Answers: 1
![](/tpl/images/ask_question.png)
![](/tpl/images/ask_question_mob.png)
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 06:30
Select the correct text in the passage. which sentences describe examples of sustainable living? i live in an old apartment building downtown, but my company is based in an office park on the outskirts of the city. i drive an old car that needs to be replaced. i plan to buy a hybrid for better gas mileage, but for now i am able to carpool with a couple of friends from work. the drive to the office park is about 45 minutes each way, but we do get to work in a modern building. the architects just received a leed certification for the design.
Answers: 3
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 18:00
Heat is the total potential energy of a substance that can be transferred. true false
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 19:00
How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 20:30
A40 kilogram skier starts at the top of a 12 meter high slope. at the bottom, she is travelling 10 meters per second. how much energy does she lose to friction
Answers: 2
You know the right answer?
The mystery of periodic law was solved when proposed his planetary atomic model of the atom, provid...
Questions
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 20.09.2020 03:01
![question](/tpl/images/cats/mat.png)
Mathematics, 20.09.2020 03:01
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 20.09.2020 03:01
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 20.09.2020 03:01
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mkx.png)
Arts, 20.09.2020 03:01
![question](/tpl/images/cats/en.png)
English, 20.09.2020 03:01
![question](/tpl/images/cats/istoriya.png)
History, 20.09.2020 03:01
![question](/tpl/images/cats/mat.png)
Mathematics, 20.09.2020 03:01
![question](/tpl/images/cats/mat.png)
Mathematics, 20.09.2020 03:01
![question](/tpl/images/cats/obshestvoznanie.png)
Social Studies, 20.09.2020 03:01
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/mat.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 20.09.2020 03:01