Homogeneous Materials Flashcards
What is a homogeneous substance?
A substance that has uniform propererties throughout
What are three categories of homogeneous substances?
- Elements
- Compounds
- Solutions
What is the simplest homogeneous material?
An element
What is an atom?
The smallest particle of an element
How are elements designated?
By alphabetical symbols
What is an atomic number?
It’s determined by the number of protons in the nucleus of an atom inside the element
What is a mass number?
The total number of particles within an atom’s nucleus
How are molecules formed?
By atoms that combine chemically
What is a compound?
A substance composed of two or more substances that uniformly combine in definite proportions
How can compounds be separated into component elements?
By chemical means
The chemical reactions that form or separate compounds follow a law. What law is this?
Law of conservation of mass
State the law of conservation of mass.
In an ordinary chemical reaction, the total mass of the reacting material is equal to the total mass of the product
Define solution
A solution is a homogeneous combination with a uniform consistency, but whose components do not chemically combine in definite proportions
Define a solute. What about a solvent?
A solute is the material being dissolved in a solution
A solvent is the material in which the other (solute) is dissolved
What does the solvent do to the solute?
The solvent breaks down the particles of the solute into microscopic particles and disperses them evenly throughout the solution.
