The Atom
This is a positively charged particle in the nucleus of an atom.
What is a proton?
This is the amount of protons in an atom's nucleus.
What is an atomic number?
These are used to balance chemical equations.
What are coefficients?
This is a substance that speeds up a chemical reaction without being used up.
What is a catalyst?
An increase in concentration, an increase in surface area, the addition of a catalyst, and an increase in temperature all help do this to chemical reactions.
What speeds up chemical reactions?
This particle has no charge and is found in the nucleus of an atom.
What is a neutron?
This is a column on the periodic table which shares the same amount of valence electrons.
What is a group?
They consist of reactants and products.
What do chemical equations consist of?
This is a reaction that releases energy to its surroundings.
What is an exothermic reaction?
This is an atom of an element which has a different number of neutrons that another atom of the same element.
What is an isotope?
This particle is negatively charged and revolves speedily around the nucleus of an atom.
What is an electron?
This is the amount of protons and neutrons in an atom's nucleus.
What is a mass number?
This is a number written to the bottom-right of an element that tells how many of the element's atoms there are in a molecule of that substance.
What is a subscript?
This is a reaction which requires an input of energy.
What is an endothermic reaction?
This is the center of the atom which is small and dense.
What is a nucleus?
This is the electron found in the outermost portion of the electron cloud.
What is a valence electron?
This is a row of elements on the periodic table which follow periodic trends.
What is a period?
This uses chemical symbols and numbers to describe substances.
What is a chemical formula?
This law states that energy cannot be created or destroyed.
What is the Law of Conservation of Energy?
This is a tool used to figure out what gas was produced during a chemical reaction.
What is a glowing splint?
This is where electrons revolve around the nucleus.
What is the electron cloud?
He was one of the first to organize the elements and his organization of the elements became known as the periodic table.
Who was Dmitri Mendeleev?
This law states that matter is neither created nor destroyed and is shown by balancing chemical equations.
What is the Law of Conservation of Mass?
What is a precipitate?
This group of elements, found in Group 18, are stable.
What are noble gases?