Chemistry Test Study Guide Flashcards
The difference between a compound and a mixture and how to separate each
A compound is a molecule with different elements in it, but a mixture is substances mixed but not chemically combined
Two separate a contact in mixture you can boil the substance and one substance will evaporate
Can a molecule be an element or a compound? Explain
A molecule can be an element because two or more of the same atoms makes an element
A molecule can be a compound because it is a molecule made of different types of atoms
What is a solution
A special kind of mixture where groups of molecules are mixed evenly
What are the elements and compounds in the air and what is the most common
Nitrogen and oxygen are the elements and carbon dioxide and water vapor are the compounds
The most common is oxygen
What is the difference between a physical and chemical change
A physical change is a change in physical property and does not create a new substance. On the other hand a chemical change creates new substance
What do these families on the periodic table tell us about the elements in them
They tell us how many electrons are on the outer shell and my other families that family reacts with
What’s the difference between chemical formulas and chemical symbols
The chemical formula shows how many of each element is molecule but a chemical symbol is an abbreviation for the element name
Definition of pure substance
All atoms or molecules are the same
What does the split test tell us
Is a chemical reaction happened or not
What things could indicate a chemical reaction occurrence
Changes in color odor heat energy gas production or precipitate formation
The difference between an element and a compound and the smallest part of each that still has the same properties of that substance
An element is it a molecule with the same elements in it, but a compound is a molecule with different elements in it and an atom is the smallest part of each but still has the same properties of that substance
