แผ่นงานWhere Do Chemical Elements Come From?
คำถามทั้งหมด: 24
In addition to emitting more light than a billion suns, what else did the star emit during the explosion?
chemicals
Sound waves
Gamma rays
Radio waves
Of the first 26 elements up to iron, which were inside the star before the explosion?
Lead and Mercury
Uranium and Plutonium
Gold and Silver
Helium and Carbon
What is the process called that forms nuclei of most elements lighter than iron?
Electrolysis
Oxidation
Photosynthesis
Nucleosynthesis
During the explosion, the star released chemicals in space. These chemicals combined to form ions and ___.
A young star is primarily composed of which element?
Hydrogen
Carbon
Helium
Oxygen
The fusion of beryllium with helium produces a ___ nucleus.
The fusion of oxygen with helium produces a ___ nucleus.
In 1054, Chinese astronomers recorded a 'guest star' in which constellation?
Scorpius
Taurus
Leo
Orion
What is the primary nuclear reaction in stars less massive than the sun?
Iron to heavier elements conversion
Helium to carbon conversion
Hydrogen to helium conversion
Carbon to oxygen conversion
In stars more massive than eight solar masses, up to which element can the chain reaction produce?
Iron
Carbon
Nickel
Oxygen
A star is a balancing act between gravity and ______ from nuclear reactions.
What happens when the core of a very massive star becomes pure iron nuclei?
The star cools down
The star expands
The core collapses
The core heats up
The 's' process in stars involves the capture of ______ to form new nuclei.
Newly formed nuclei can be different versions of a given element called _________.
An isotope are different versions of the same element with the same number of protons but have different numbers of ________.
Nickel-64 and Nickel-65 are similar because they both contain 28 protons but
nickel-64 contains 64 protons and nickel-65 contains 65 neutrons.
nickel-64 contains 36 protons and nickel-65 contains 28 neutrons.
nickel-64 contains 36 neutrons and nickel-64 contains 37 neutrons.
nickel-64 contains 28 neutrons and nickel-65 contains 37 neutrons.
Nickel-65 is radioactive and transforms into Copper-65 when a neutron of Nickel-65 transforms into a proton and an electron. This process is called
"s" process
"r" process
beta decay
supernova
New elements are created during the explosion of a star. The nuclei of various elements captures neutrons that are released in the explosion. These elements then become the nuclei of the next element because a neutron will transform into a ________ and an electron.
What technique do scientists use to determine which chemical elements are formed inside stars?
Mass spectrometry
Visible spectroscopy
Electron microscopy
X-ray diffraction
The emission spectrum of hydrogen consists of how many lines?
Six
Five
Seven
Four
Atoms and molecules produce their own 'fingerprint' or 'signature' when the light they emit is spread in a ___.
What is the main component of the gas in an interstellar cloud?
Oxygen
Helium
Carbon
Hydrogen
When an element formed through the
“r” process becomes really heavy, it
spontaneously breaks apart through a process called ___.
The nitrogen in our DNA and the calcium in our teeth were made in the interiors of ___.
แป้นคำตอบWhere Do Chemical Elements Come From?
คำถามทั้งหมด: 24
chemicals
Helium and Carbon
Nucleosynthesis
Hydrogen
Taurus
Hydrogen to helium conversion
Iron
The core collapses
nickel-64 contains 36 neutrons and nickel-64 contains 37 neutrons.
beta decay
Visible spectroscopy
Four
Hydrogen