Formation of Elements

Which of the following elements were produced during primordial nucleosynthesis?

• Deuterium

• Oxygen

• Helium

• Silicon

Which of the following elements has one proton and three neutrons?

• Deuterium

• Helium-4

• Helium-3

• Tritium

Which of the following nuclei collided and reacted with helium-4 to produce lithium-7 and a photon?

• Tritium

• Helium-3

• Deuterium

• Beryllium-7

Which two particles need to collide to produce the deuterium nuclei and a photon?

• Proton

• Electron

• Neutron

• Photon

________ is the process by which elements are formed within stars.

• Stellar Evolution

• Stellar Nucleosynthesis

• Star Formation

• Supernova

The formation of a star starts with the dense regions of molecular clouds. What force pulls matter together to form these regions?

• electromagnetic force

• gravitational force

• nuclear force

• Coulomb force

Which of the following refers to the chain reaction by which a star transforms hydrogen into helium?

• Alpha process

• Triple alpha process

• Proton-proton chain

• Carbon-Nitrogen-Oxygen cycle

About how long ago do scientists believe the universe began?

• 13-14 billion years ago
• 13-14 million years ago
• 12-13 billion years ago
• 12-13 million years ago

Tags

NGSS.HS-ESS1-2

What were the original two elements in our universe?

• Lithium and Carbon
• Hydrogen and Neon
• Helium and Chlorine
• Hydrogen and Helium

What do you call the process that forms nuclei from pre-existing nucleons?

• Nucleosynthesis

• Oscillation process

• Nuclear reaction

Tags

NGSS.HS-ESS1-3