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Questions and Answers
What are atoms primarily composed of?
What are atoms primarily composed of?
- Protons, neutrons, electrons (correct)
- Protons, quarks, gluons
- Quarks, gluons, electrons
- Protons, neutrons, quarks
What force holds the nucleus of an atom together?
What force holds the nucleus of an atom together?
- Weak force
- Gravitational force
- Electromagnetic force
- Strong force (correct)
What particles make up protons and neutrons in the nucleus?
What particles make up protons and neutrons in the nucleus?
- Quarks and gluons (correct)
- Photons and neutrinos
- Leptons and bosons
- Electrons and positrons
At what speeds do electrons orbit the atom's nucleus?
At what speeds do electrons orbit the atom's nucleus?
Despite appearing mostly empty, what influences the structure of atoms?
Despite appearing mostly empty, what influences the structure of atoms?
How many carbon atoms are there in a human hair?
How many carbon atoms are there in a human hair?
What is the approximate size of the atoms in a human fist compared to the size of the Earth?
What is the approximate size of the atoms in a human fist compared to the size of the Earth?
What are the three subatomic particles that make up an atom?
What are the three subatomic particles that make up an atom?
What is believed to hold the quarks together in protons and neutrons?
What is believed to hold the quarks together in protons and neutrons?
What influences the structure of atoms despite the perception of emptiness?
What influences the structure of atoms despite the perception of emptiness?
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Study Notes
- A human hair contains around 500,000 carbon atoms stacked on top of each other, while a human fist contains trillions and trillions of atoms, roughly the size of Earth.
- Atoms are made up of protons, neutrons, and electrons, with protons and neutrons forming the nucleus held together by the strong force, one of the four fundamental forces in the universe.
- Protons and neutrons are composed of quarks held together by gluons, believed to be point-like entities.
- Electrons orbit the atom's nucleus at speeds around 2,200 km/s, traveling fast enough to orbit Earth in just over 18 seconds.
- Despite the perception of emptiness, an atom is mostly empty space except for quantum fluctuations in the fields that affect how charged particles interact, influencing the structure of atoms.
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