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Chemistry Language
Chemistry Language continued
Periodic Table
Atoms
Elements
100
One or two letters used to represent atoms.
What are symbols?
100
Formulas written on the left side of the arrow symbol are the starting substances in a chemical reaction.
What are the reactants?
100
These run horizontally across a periodic table.
What are periods?
100
Positively charged subatomic particles located in the nucleus.
What are protons?
100
O
What is Oxygen?
200
A small number that is written below the normal line of letters to show many atoms of each element is present in a substance.
What is subscript?
200
An arrow symbol that shows a reaction has taken place.
What is yields?
200
These elements have the same number of valence electrons.
What are groups or families?
200
Negatively charged subatomic particles located in energy levels around the nucleus.
What are electrons?
200
Ne
What is Neon?
300
A way to show the number and type of atoms in a compound or a molecule with symbols and numbers.
What is a chemical formula?
300
Formulas written on the right side of the arrow symbol are the new substances formed in a chemical reaction.
What is the product?
300
These run vertically (up and down) the periodic table.
What are groups or families?
300
Neutral subatomic particles located in the nucleus.
What is neutrons.
300
Ca
What is Calcium?
400
A number in front of any chemical formula in a chemical equation showing the number of molecules involved in the reaction.
What is a coefficient?
400
This describes what happens in a chemical reaction. This also identifies the starting materials and resulting substances in formula form.
What is the chemical equation?
400
These have the same number of energy levels.
What are periods?
400
Formula to find the number of neutrons.
What is Atomic Mass (M)-Atomic number (A)=Neutrons (N)
400
Pb
What is lead?
500
A substance composed of two or more elements chemically combined and in a definite proportion.
What is a compound?
500
A change in which a substance (or substances) is changed into one or more new substances with different properties than the original substances.
What is chemical reaction?
500
An element has a metallic-gray appearance. It also has the properties of both a metal and a nonmetal.
What is a type of metalloid?
500
An atom with full or empty energy levels.
What is a stable atom?
500
K
What is Potassium?