Podcast
Questions and Answers
What is the smallest number in the periodic table box called?
What is the smallest number in the periodic table box called?
- Element number
- Atomic number (correct)
- Atomic weight
- Periodic number
What is an element?
What is an element?
- One type of atom (correct)
- A mixture of substances
- A complex molecule
- A compound of atoms
What does it mean to have a homogeneous mixture?
What does it mean to have a homogeneous mixture?
- Large particles suspended
- Separate layers visible
- Uniform composition throughout (correct)
- Non-uniform composition
What does it mean to have a heterogeneous mixture?
What does it mean to have a heterogeneous mixture?
What is the atomic weight?
What is the atomic weight?
Flashcards are hidden until you start studying
Study Notes
Key Concepts in Chemistry
-
The smallest number in the periodic table box is known as the atomic number, which represents the number of protons in an atom's nucleus.
-
An element is a pure substance that cannot be broken down into simpler substances by chemical means, defined by a unique atomic number and distinguished by its properties.
Mixtures
-
A homogeneous mixture is a mixture that has a uniform composition and properties throughout, meaning the individual components are not distinguishable and are evenly distributed.
-
A heterogeneous mixture contains visibly different substances or phases, where the components can often be seen and separated, resulting in a non-uniform composition.
Atomic Characteristics
- The atomic weight (or atomic mass) of an element is the weighted average mass of an atom of an element based on the distribution of isotopes in a natural sample, usually expressed in atomic mass units (amu).
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
