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Chemistry Test Flashcard
To help anyone study with a chemistry test
16
Chemistry
8th Grade
05/20/2011

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Term
What is the definition of Valence electrons?
Definition
In chemistry, valence electrons are the outermost electrons of an atom, which are important in determining how the atom reacts chemically with other atoms. The maximum amount of valence electrons is eight, it can’t go any higher than that.
Term
What is the definition of the Nucleus?
Definition
The central and most important part of an object, movement, or group, forming the basis for its activity and growth
Term
What is the definition of the Electron Cloud?
Definition
An atomic orbital is a mathematical function that describes the wave-like behavior of either one electron or a pair of electrons in an atom. Outside of the nucleus, where the electrons are found.
Term
What is the definition of an element?
Definition
A part or aspect of something,
Term
What is a chemical change?
Definition
During a chemical change, substances are changed into different substances. (Changes chemical make-up)
Term
What is a physical change?
Definition
The change from one state (gas, liquid or solid) to another.(Doesn’t change chemical make-up)
Term
What is a metal?
Definition
A substance with high electrical conductivity, luster, and malleability, which readily loses electrons to form positive ions. Found on the left of the Periodic Table
Term
What is a non-metal?
Definition
One of the elements which do not exhibit metallic properties. Found on the right of the Periodic Table
Term
What are metalloids?
Definition
An element with properties intermediate between those of a metal and nonmetal. Found in the middle of the Periodic Table
Term
What is luster?
Definition
Luster of a mineral is the way its surface reflects light.
Term
What is the definition of being malleable?
Definition
Capable of being shaped.
Term
What is ductile?
Definition
Ductile is a physical property of a material associated with their ability to be hammered thin or stretched into wire without breaking.
Term
Why is it important for us to know how to balance equations?
Definition
It’s important because you are usually interested in finding of how efficient your processes are. Matter can be neither be created or destroyed, it only can be changed
Term
What are some important components of a qualitative analysis?
Definition
A qualitative analysis is detailed.
Term
What are the following substances, and how do you find their number?
Protons-
Electrons-
Neutrons-
Energy Levels-
Definition
Protons- Same as the atomic number
Electrons- Same as the atomic number
Neutrons- The atomic number subtracted by the atomic mass.
Energy Levels- The row the element is found.
Term
What are some key differences between metals, nonmetals and metalloids?
Definition
Metals are shiny, nonmetals are not, and metalloids might.
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