Definitions
Chemistry
the science that deals with the properties, composition, and structure of substances
What is the number 1 rule in a lab?
SAFETY!
What is an atom?
A particle of matter that defines a chemical element.
What is H and what is it's atomic number?
Hydrogen, 1
What is a technique?
A specific way of doing a task.
Elements
A chemical element is a chemical substance that cannot be broken down into other substances.
What causes risk in the lab?
Chemicals/Improper safety procaustions.
What is a molecule?
A group of atoms bonded together
What is Nitrogen's atomic number?
7
What is a technique in regards to chemistry?
A chemical or principal used.
Periodic Table
An array of chemical elements that is in order of increasing atomic number.
What labs should you wear safety goggles?
Anything with chemicals, flames, or other substances that can get in your eyes.
Why are safety goggles important?
They prevent chemicals and other substances from getting in your eye.
What is O and what is it's atomic number?
Oxygen, 8
What is a endothermic reaction?
A reaction that absorbs heat.
Laboratory
A laboratory is a facility that provides controlled conditions where scientific or technological research, experiments, and measurement may be performed
What is a major rule in lab saftey?
If anything is damaged or broken report it immediately.
Why are molecules important?
They are a unit of measure in chemistry.
What is Ag?
Silver
What is an exothermic reaction?
A reaction that emits heat.
Properties
Properties are the characteristics that make us able to tell one material from another.
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How are molecules bonded together?
Strong attractive bonds called chemical bonds.
What atomic number is helium?
2
How many elements are on the periodic table as of 2023?
118