Physics 8.1.3 Flashcards
How are all the Naturally Occurring Elements (excluding Hydrogen) Formed?
By Nuclear Fusion in Stars.
When does ‘Nuclear Fusion’ Occur?
Nuclear Fusion Occurs when 2 Light Nuclei Collide at High Speeds & Temp.s, & Fuse to Create a Larger, Heavier, Nucleus.
What was the only Element Present at the Start of the Universe?
Hydrogen.
What will Happens if 2 Hydrogen Nuclei Collide with Enough Energy?
They will Fuse into a Helium Nucleus.
What are the 3 most Common Hydrogen Isotopes Present on the Sun (that partake in Nuclear Fusion)? What are the Formulae?(3)
-Protium, 1
1 H
-Hydrogen, 2
1 H
-Tritium, 3
1 H
Protium + Tritium = …
Helium.
The Most Common Isotope of an Element is the one Used to Represent said Element on the…
Periodic Table.
The Process of Nuclear Fusion Releases Energy in the Forms of ___ & ___. They Travel to Earth as ___ ___, & Supply us with the ___ & ___ that we need to survive.
Light, Heat. Gamma Rays. Light, Heat.
During the majority of a Star’s Lifetime, ___ Nuclei Fuse Together to Form ___ Nuclei.
Hydrogen, Helium.
Elements Lighter than ___ are Formed via Nuclear Fusion in the Sun.
Iron.
Where are Elements Lighter than Iron Produced?
In Nuclear Fusion in the Sun.
Where are Elements Heavier than Iron Produced?
Elements that are Heavier than Iron are Produced in Supernova Explosions.
What is a ‘Supernova’?
A Supernova is a Bright & Powerful Explosion which Happens at the End of a High Mass Star’s Life.
What Happens Following a Supernova? (2)
-When the Star Explodes, it Releases v. Large Amounts of Energy & Neutrons.
-All of the Elements which have been Produced by the Nuclear Fusion Reactions get thrown out, & they Combine with the Neutrons, to Form Heavier Elements.
