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Questions and Answers
What is an atom and why is it considered the smallest unit of an element?
What is an atom and why is it considered the smallest unit of an element?
An atom is the smallest unit of an element that retains its chemical properties, and it cannot be divided further into smaller particles.
According to Dalton's Atomic Theory, how do atoms of the same element compare to atoms of different elements?
According to Dalton's Atomic Theory, how do atoms of the same element compare to atoms of different elements?
Atoms of the same element are identical, but they differ from the atoms of other elements.
Identify the three main subatomic particles of an atom and their respective locations.
Identify the three main subatomic particles of an atom and their respective locations.
The three main subatomic particles are electrons (in orbits outside the nucleus), protons (in the nucleus), and neutrons (in the nucleus).
How does the mass of an electron compare to that of a hydrogen atom?
How does the mass of an electron compare to that of a hydrogen atom?
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What is stated about the creation and destruction of atoms in relation to chemical reactions?
What is stated about the creation and destruction of atoms in relation to chemical reactions?
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Study Notes
Atomic Structure
- Atoms are the smallest, indivisible particles of an element.
- Atoms of the same element are identical.
- Atoms of different elements differ.
- Atoms can neither be created nor destroyed.
- Atoms may or may not have independent existence, but can participate in chemical reactions.
Subatomic Particles
- Atoms are composed of even smaller particles called subatomic particles.
- Subatomic particles are: electrons, protons, and neutrons.
- Electrons are negatively charged and have negligible mass compared to protons and neutrons.
- Protons are positively charged and have a mass equivalent to a neutron.
- Neutrons are neutral (no charge) and have a mass similar to a proton.
Properties of Subatomic Particles
-
Electron:
- Symbol: e⁻
- Charge: -1 unit
- Charge in Coulombs: 1.602 x 10⁻¹⁹ C
- Mass in amu: negligible
- Mass in kg: 9.1 x 10⁻³¹ kg
- Location: orbits outside the nucleus
-
Proton:
- Symbol: p⁺
- Charge: +1 unit
- Charge in Coulombs: 1.602 x 10⁻¹⁹ C
- Mass in amu: 1 amu
- Mass in kg: 1.6 x 10⁻²⁷ kg
- Location: nucleus
-
Neutron:
- Symbol: n⁰
- Charge: 0
- Charge in Coulombs: 0
- Mass in amu: 1 amu
- Mass in kg: 1.6 x 10⁻²⁷ kg
- Location: nucleus
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Description
Explore the fundamental concepts of atomic structure and the properties of subatomic particles in this quiz. Learn about atoms, their characteristics, and the roles of electrons, protons, and neutrons. Test your knowledge on the building blocks of matter!
