SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Electrons spin around the nucleus in a fixed orbital
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Protons spin around the nucleus in fixed orbitals
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An atom is a round sphere shaped like a planet
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Every atom is a little planet
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Detailed explanation-1: -According to Bohr Atomic model, a small positively charged nucleus is surrounded by revolving negatively charged electrons in fixed orbits.
Detailed explanation-2: -The Bohr model postulates that electrons orbit the nucleus at fixed energy levels.
Detailed explanation-3: -The Bohr model shows the atom as a central nucleus containing protons and neutrons with the electrons in circular orbitals at specific distances from the nucleus (Figure 1). These orbits form electron shells or energy levels, which are a way of visualizing the number of electrons in the various shells.
Detailed explanation-4: -Unlike planets orbiting the Sun, electrons cannot be at any arbitrary distance from the nucleus; they can exist only in certain specific locations called allowed orbits.
Detailed explanation-5: -In Bohr’s model, electrons moved around the atomic nucleus in circular orbits, but those orbits had set discrete energies, and electrons could gain or lose energy only by moving from one orbit to another, absorbing or emitting radiation as necessary.