What is a representation of an atom, ion, or molecule that uses symbols and numbers to show the number of atoms or ions in a substance?
100
A variation of the same element that has a different mass number and different number of isotopes.
What is an isotope?
200
The amount of matter in a specified amount of space
What is density?
200
The energy of motion.
What is kinetic energy?
200
The atomic model created in 1913 that has a nucleus circled by electrons in a regular path.
What is the Bohr model?
200
The law of conservation of mass.
What is the law that states matter can neither be created nor destroyed?
200
What are the three types of elements?
What are metals, nonmetals, and metalloids?
300
A characteristic of a substance that can be observed without changing the identity of the substance.
What is a physical property?
300
The amount of mechanical energy a substance has.
What is the sum of a substance's kinetic and potential energy?
300
A row made up of atoms increasing in atomic number on the periodic table.
What is a period?
300
A substance that only has carbon and hydrogen.
What is a hydrocarbon?
300
An ion.
What is the result of an atom gaining or losing an electron?
400
The state of matter in which a substance's particles can only vibrate in place.
What is a solid?
400
The energy transferred to an object at a higher temperature to an object of a lower temperature.
What is heat?
400
An interaction that holds atoms or ions together.
What is a chemical bond?
400
A nuclear reaction in which an unstable nucleus can give off energy and possibly particles.
What is radioactive decay?
500
The process by which a solid directly becomes a gas; give an example on this process
What is sublimation; dry ice to carbon dioxide.
500
An energy source that is always available.
What is a renewable resource?
500
The type of bond that results from the sharing of valence electrons between two nonmetals.
What is a covalent bond?
500
The three disadvantages of nuclear fusion.
What are a net loss of energy, no known material that can sustain the extreme heat and pressure amounts caused by fusion, and difficulty in creating a prolonged reaction?
500
6 signs of a chemical reaction.
What are change in odor, light given off, heat given off, solid formed, a gas formed, and a new substance formed?