Multiple Choice
What electron transition in a hydrogen atom, starting from n = 8, will produce light of wavelength 389 nm?
2. Atoms & Elements
The Atom
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is true of all atoms?
A
They contain protons, neutrons, and electrons.
B
They are always stable.
C
They have the same number of protons and electrons.
D
They have a positive charge.
Verified step by step guidance1
Understand that atoms are the basic units of matter and consist of three main subatomic particles: protons, neutrons, and electrons.
Recognize that protons are positively charged particles found in the nucleus of an atom, while neutrons are neutral particles also located in the nucleus.
Identify that electrons are negatively charged particles that orbit the nucleus in various energy levels or shells.
Note that while atoms generally have the same number of protons and electrons, making them electrically neutral, this is not always the case for ions.
Clarify that atoms are not always stable; stability depends on the arrangement of electrons and the energy state of the atom.
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