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Questions and Answers
What are the three main particles that compose an atom?
What are the three main particles that compose an atom?
- Electrons, protons, and neutrons (correct)
- Electrons, neutrons, and ions
- Protons, neutrons, and quarks
- Protons, electrons, and positrons
What is the charge of protons in the nucleus of an atom?
What is the charge of protons in the nucleus of an atom?
- Variable charge
- Positive charge (correct)
- Negative charge
- Neutral charge
How are electrons arranged in an atom?
How are electrons arranged in an atom?
- Electrons exist randomly throughout the atom.
- Electrons orbit around the nucleus. (correct)
- Electrons form clusters within the nucleus.
- Electrons are fixed in place within the nucleus.
What drives the attraction between the nucleus and electrons?
What drives the attraction between the nucleus and electrons?
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How many different elements are composed of atoms?
How many different elements are composed of atoms?
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Study Notes
Atomic Structure
- Atoms are the smallest building blocks of all elements.
- They are composed of three main particles: electrons, protons, and neutrons.
Electrons, Protons, and Neutrons
- There are 98 different elements, each made up of atoms.
- Atoms consist of electrons, protons, and neutrons.
Formation of Atoms
- An atom is the smallest unit of an element.
- Atoms are comprised of protons and neutrons in the nucleus, with electrons orbiting around it.
- The nucleus has a positive charge due to protons, while electrons have a negative charge.
Why the Nucleus Pulls Electrons
- The attraction between the positively charged nucleus and the negatively charged electrons creates the planetary model of the atom.
- This attraction is similar to the Earth pulling on the Moon.
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