Questions and Answers
What type of particle is a proton?
What is a neutron?
What type of particle is an electron?
What does the atomic number represent?
Signup and view all the answers
What does the atomic mass number indicate?
Signup and view all the answers
What is an electron cloud?
Signup and view all the answers
What is an isotope?
Signup and view all the answers
What are energy levels in an atom?
Signup and view all the answers
What is an orbital?
Signup and view all the answers
What is electron configuration?
Signup and view all the answers
Who theorized that all matter is made up of atoms which cannot be divided?
Signup and view all the answers
What did JJ Thomson discover about atoms?
Signup and view all the answers
What was Rutherford's contribution to atomic theory?
Signup and view all the answers
What did Bohr create in relation to atomic structure?
Signup and view all the answers
What are valence electrons?
Signup and view all the answers
Study Notes
Atomic Structure and Theory
- Protons are positively charged particles found in the nucleus of an atom, key in determining the atom's identity.
- Neutrons are neutral particles, also located in the nucleus, contributing to the atom's mass but not its charge.
- Electrons are negatively charged particles that orbit the nucleus, essential in chemical bonding and reactions.
- Atomic number defines the number of protons in an atom, which identifies the specific element.
- Atomic mass number is the total count of protons and neutrons in the nucleus, reflecting the atom's mass.
- The electron cloud is a visual model depicting regions where electrons are likely to be found surrounding the nucleus.
- Isotopes are variants of an element with the same number of protons but differing numbers of neutrons, leading to varying mass numbers.
- Energy levels refer to the specific energies that electrons can possess within an atom, influencing their orbits.
- Orbitals are regions of three-dimensional space around the nucleus where the probability of finding an electron is high.
- Electron configuration details the specific arrangement of electrons in the atom's orbitals, impacting chemical properties.
- Dalton proposed that matter is composed of indivisible atoms, forming a foundational view of atomic theory.
- JJ Thomson conducted experiments leading to the discovery of smaller particles within the atom, introducing the Plum Pudding Model to represent atomic structure.
- Rutherford determined that an atom's positive charge resides in a dense nucleus, rather than being spread throughout.
- Bohr developed a model illustrating the arrangement of electrons in specific energy levels around the nucleus.
- Valence electrons are found in the outermost energy level of an atom, playing a crucial role in chemical bonding and reactivity.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Explore key concepts of atomic structure with these flashcards. Learn about protons, neutrons, electrons, and atomic numbers, which are essential for understanding the foundation of chemistry and physics. Perfect for students seeking to grasp the basics of an atom.
