The Atom
Atoms make up matter.
What makes up matter?
The elements are the basic substances of matter.
What are the elements?
Chemical reactions show new substances, odor changes, and gas formation.
What are the signs of a chemical reaction?
John Dalton, J.J Thomson, Ernest Rutherford, and Niels Bohr all contributed to the making of the modern atomic theory.
Who developed the atomic theory?
The elements are organized in numerical order by atomic number.
How are the elements organized?
Chemical formula and chemical equations.
How are chemical reactions modeled?
Electrons don't move in circular paths around the nucleus. Electrons move around the nucleus in an area called the electron cloud.
What is the current atomic theory?
The atomic and mass number, chemical symbol and name, and average atomic mass.
What information is contained on each square on the periodic table?
There are coefficients to balance out reactants and products.
How do chemical equations show the law of conservation of mass?
Protons, Neutrons, Electrons.
What are the parts of an atom?
Elements are arranged by metals, nonmetals, and metalloids.
How are the elements arranged on the periodic table?
Energy is either released or put in.
What happens to energy during chemical reactions?
Every substance is different. Atoms can be described by the atomic or mass number.
How can we describe atoms?
Dmitri Mendeleev.
Who first organized the periodic table?
Concentration, surface area, temperature, and catalysts(enzymes).
What effects the rates of reactions?