Podcast
Questions and Answers
What is atomic theory?
What is atomic theory?
- The scientific study of atoms
- A type of chemical bond
- The smallest particle of matter (correct)
- The building blocks of life
Where are protons located?
Where are protons located?
Inside the nucleus
What is the charge of a proton?
What is the charge of a proton?
Positively charged
What is the symbol for a proton?
What is the symbol for a proton?
Where are neutrons located?
Where are neutrons located?
What is the charge of a neutron?
What is the charge of a neutron?
What is the symbol for a neutron?
What is the symbol for a neutron?
Where are electrons located?
Where are electrons located?
What is the charge of an electron?
What is the charge of an electron?
What is the mass of an electron compared to protons and neutrons?
What is the mass of an electron compared to protons and neutrons?
What is the atomic number?
What is the atomic number?
What does the mass number represent?
What does the mass number represent?
What units is mass measured in?
What units is mass measured in?
The number of protons in an atom must equal the _____
The number of protons in an atom must equal the _____
Study Notes
Atomic Theory
- Atoms are the smallest units of matter and are fundamental building blocks of all substances.
Protons
- Protons are located in the nucleus of the atom.
- They carry a positive charge, denoted as p+.
- Each proton has a mass of approximately 1 atomic mass unit (amu).
Neutrons
- Neutrons are also found in the nucleus.
- They possess no electric charge, making them neutral, denoted as n.
- The mass of a neutron is around 1 amu, similar to protons.
Electrons
- Electrons orbit the nucleus and are much smaller than protons and neutrons.
- They are considered virtually weightless and carry a negative charge, represented as e-.
Atomic Number
- The atomic number identifies an element and is defined as the total number of protons in the nucleus.
- Each element has a unique atomic number that distinguishes it from other elements.
Mass Number (Atomic Mass)
- The mass number is the sum of protons and neutrons in an atom.
- It is measured in atomic mass units (amu), providing a way to gauge the total mass of an atom.
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Description
Test your knowledge of atomic structure with these flashcards designed for Grade 9 Chemistry. Explore key terms like atomic theory, protons, neutrons, and electrons to enhance your understanding of matter. Perfect for quick revision before exams!
