Atomic Theory
What is an atom?
An atom is the smallest particle that can still be considered an element.
Who created the Periodic Table?
Dmitry Mendeleev created the Periodic Table.
What is bonding?
Bonding occurs when two or more elements bind together.
What is a nonmetal?
A nonmetal is an element that lacks all the metallic attributes.
What happens in a reaction?
In a reaction, substances are transformed into different substances.
Name one of Dalton's assumptions.
All elements consist of atoms; atoms of the same element are exactly alike.
What is atomic mass?
Atomic mass is the average mass of all the isotopes of an element.
Define ionic bonding.
Ionic bonding is the attraction between ions of opposite charge.
Name a noble gas.
Examples include Helium, Neon, Argon, Krypton, Xenon, or Radon.
Define oxidation
Oxidation is the process of losing electrons during a reaction.
What can atoms not change into?
Atoms cannot change into different elements via atomic reactions.
Name one property used to organize the Periodic Table.
Melting point, density, color, or atomic mass.
What is a covalent bond?
A covalent bond is a chemical bond when two atoms share electrons.
What are lanthanoids?
Lanthanoids are a group of 15 chemical elements that are rare earth metals.
What is a reactant?
A reactant is a substance that takes part in and undergoes change during a reaction.
Describe Thomson’s Model.
Thomson's Model describes an atom as a ball of positive charge with electrons spread within it.
What is a group in the Periodic Table?
A group contains elements that have the same number of valence electrons.
Describe a polar bond.
A polar bond occurs when electrons are shared unequally between atoms, leading to slight electric charges.
What is a transuranium element?
Transuranium elements are those that have atomic numbers greater than that of uranium and are generally radioactive.
Describe a chemical reaction.
A chemical reaction involves the breaking and forming of bonds to convert reactants into products.
What does the Cloud Model represent?
The Cloud Model represents electrons in clouds surrounding the nucleus, with the cloud being less dense.
How do isotopes differ?
Isotopes differ in the number of neutrons they contain.
What is a neutralization reaction?
A neutralization reaction is the reaction between an acid and a base to form water and salt.
Give an example of an acid.
Examples include Hydrochloric Acid, Sulfuric Acid, or Acetic Acid.
What is the law of conservation of mass?
The law of conservation of mass states that mass is neither created nor destroyed in a chemical reaction.