Matter
This is anything that takes up space and has mass.
What is matter?
This change produces a new substance and cannot be easily reversed.
What is a chemical change?
This part of the atom is found in an atom and has a negative charge.
What is an electron?
These elements already have full outer shells and are not very reactive
What are noble gases?
This law states that mass cannot be created or destroyed in a closed system.
What is the Law of Conservation of Mass?
This is the amount of material in a substance.
What is mass?
Melting bronze is this type of change because only the state changes, not the substance.
What is physical change?
This is the main reason atoms form chemical bonds.
What is to become stable (not reactive)?
Although it sits on the far left of the periodic table with the metals, this element behaves like a nonmetal and tends to gain an electron to form a negative ion.
What is Hydrogen?
In a closed system, this is what happens to mass when salt dissolves in water
What is the mass stays the same?
This is the amount of space a substance occupies.
What is volume?
This famous reaction is a physical change because it is rapid un-dissolving of gas, not a new substance forming.
What is Diet Coke and Mentos?
This forms when an atom gains or loses electrons.
What is an ion?
This group of elements usually lose electrons and become positive ions.
What are metals?
During a chemical reaction, this quantity remains the same.
What is the number of atoms?
This is a substance made of two or more different elements chemically bonded together.
What is a compound (or molecule)
This is one piece of evidence that a chemical change has occurred.
What is unexpected color change, formation of a gas, temperature change, or smell.
This is what a chlorine atom is most likely to do when forming an ion.
What is gain electrons and become negative?
This group of elements usually gain electrons and become negative ions.
What are nonmetals?
In a chemical formula, the subscripts (little numbers) tell you this.
What is how many atoms of each element are in a compound?
This is a combination of two or more substances that can be separated physically.
What is a mixture?
This famous equation represents a chemical reaction: CO₂ + H₂O → C₆H₁₂O₆ + O₂.
What is photosynthesis?
This type of bond usually forms between two nonmetals.
What is a covalent bond?
This metal forms a +2 ion because it loses two electrons when it reacts.
What is Ca? (or Be, Mg, Sr, Ba, or Ra?)
These appear on the right side of the arrow in a chemical equation.
What are products?