2. Stellar Formation and Evolution a. H +H →²¼H + b. 2H +H →32HE + c. 32He +32He → 42He + - -

Q: Explain the nuclear theory of the atom ?

A: Atom is the smallest, tiny indivisible particle of any matter. There are three fundamental subatomic…

Q: In what ways are isotopes are alike? In what ways are they different?

A: Isotopes are the atoms of same element having the same atomic number.

Q: The discovery that uranium emitted invisible rays was made accidentally. O True O False

A: The answer is given as follows Uranium was discovered in 1789 by Martin Klaproth, a German chemist,…

Q: This experiment concerns kinetics and isotopes. Isotopes are atoms of an element that differ only in…

A: Radioactivity : It is the decay process by which atomic nuclei undergoes nuclear changes by loss of…

Q: The radioactive element carbon 14 has a 1/2 life of 5750 years a scientist determined that the bones…

A: let assume the initial concentration of C-14 as Co=100%

Q: Where are elements heavier than helium created?

A:

Q: Why are the chemical properties of all isotopes of the same element identical?

A: Atoms of the same element, having same number of protons and electrons, but differing only in the…

Q: greatest number of stable isotopes? Ne, F, Na

A: The objective is to determine the greatest number stable of isotopes.

Q: The cleanup of threat of toxic nuclear isotopes can be permanently eliminated by simply storing it…

A: Toxic nuclear isotopes cannot be permanently eliminated. This is temporary process.

Q: + 42 He

A:

Q: This is the heaviest naturally occurring element  A) 87Fr B) 94Pu C) 92U D) 103Lr E) 102No

A: This is the heaviest naturally occurring element-

Q: p. 5726Fe + on →. + 'on → 5926FE q. r. 5726FE > + °1B

A: During nuclear reaction various types of elements and isotopes are formed due to absorption or…

Q: Radium-226 is radioactive and has a half life of 1600. years. What percentage of a sample would be…

A: This problem is based on Nuclear Chemistry which is a subtopic of Chemical Kinetics.Here,…

Q: Explain how the cathode ray was discovered.

A: Cathode rays are the beam of electrons that are observed in vacuum tubes. They are also called…

Q: Which nuclear process powers the sun? Group of answer choices Nuclear Fission Nuclear Decay Nuclear…

A: Sun mainly contains two gases hydrogen and helium. Nuclear fission is process in which nuclei splits…

Q: 241 95Am + He - b. 2Ra 226 He +

A:

Q: What are the 10 natural radioactive elements?

A:

Q: decay series of uranium- 238 includes 3 different isotopes of polonium. Which of these isotopes you…

A: Uranium-238 is a radioactive element that undergoes a complex decay series, eventually transforming…

Q: 209Bi is the heaviest stable isotope of any element. How many protons and neutrons are present in…

A: The given data contains atomic mass of Bismuth is 209.

Q: . An unstable isotope that lies under the stability curve of the nucleus will emit.... a.…

A:

Q: The source of the energy produced by the sun is

A: The sun is a star, and like all stars, it is made up of a hot, glowing gas. This gas is primarily…

Q: For numbers 1-6, refer to the given choices below. A. Isotopes B. Isobars C. Isotones 1. 23892U and…

A:

Q: Isotopes are atoms with the same number of _______________ and _______________ but different numbers…

A:

Q: control rod? CO

A:

Q: Why does it stop there?  Why doesn't it go on to uranium or neptunium?

A: Given:It is given that,"High mass stars fuse heavier and heavier elements, starting with Hydrogen,…

Q: A radioactive atom undergoes significant changes as it emits radiation. True O False

A: Radioactive atoms emits radiation in form of gamma rays or alpha rays.

Q: Magic numbers are associated with protons and neutrons in a nucleus. State the magic numbers for…

A: There are many factors that give to nuclear stability.  These are, Full nuclear shell (magic…

Q: What are Cathode rays?

A: Given information,      Cathode rays

Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.