Atoms
The smallest particle into which an element can be divided and still be the same element.
What is an atom?
The way that the elements are organized.
What is the Periodic table of elements?
The process in which atoms are rearranged to produce new substances.
What is a chemical reaction?
One of the things that form everything in the world.
What is an element?
A theory that states that electrons don't move in circular paths and instead move within an area around the nucleus called the electron cloud.
What is the atomic theory?
A positively charged particle of an atom.
What is a proton?
The columns that elements are organized into.
What is a group?
Gas bubbles, a solid forms, color change, and change in odor.
What are some signs of a chemical reaction?
The number of protons in the nucleus of an element and the way the elements are organized in the periodic table of elements.
What is an atomic number?
This person was a British chemist and his theory stated that matter is made up of atoms and atoms can't be created, divided, or destroyed.
Who published the first atomic theory?
A particle that has no electric charge and is a bit heavier than a proton.
What is a neutron?
The rows in which elements are organized into.
What is a period?
A reaction that takes in energy.
What is an endothermic reaction?
The letters used in place of the name of an element.
What is a chemical symbol?
He published a theory that stated that there were smaller particles than atoms called electrons.
Who published the second atomic theory?
A negatively charged particle that moves very quickly around the nucleus and is considered to have a mass of 0u.
What is an electron?
He created a table to organize the elements.
What is the name of the person who invented the periodic table?
A reaction that gives off energy.
What is an exothermic reaction?
They are grouped into metals, nonmetals, or metalloids.
How are the elements on the periodic table organized?
He published a theory that stated that there are a nucleus and protons in every atom.
Who published the third atomic theory?