Definitions
The smallest unit of a chemical compound, composed of two or more atoms bonded together.
What is a molecule?
In experiment 2.1 we noted the natural movement within gases and liquids that spread out particles from an area of higher concentration to an area of lower concentration. What is this movement called?
What is diffusion?
The energy an object has due to its motion.
What is kinetic energy?
In 1897 this English scientist described atoms as similar to a traditional English dessert, plum pudding, in which the plums are scattered throughout the pudding.
Who is J.J.(Joseph John) Thomas
I am a homogeneous mixture made by dissolving one substance in another.
What is a solution?
The number of protons in an atom.
What is the atomic number?
In experiment 3.1 we constructed 3-D atomic models. What element has the atomic number of 7?
What is nitrogen?
_____, charge and location in an atom can be used to distinguish one subatomic particle from another.
What is mass?
This famous scientist earned the Nobel prize in chemistry in 1908 for his work with radioactive substances.
Who is Ernest Rutherford?
I am electrons that are in the highest energy level of an atom.
What are valence electrons?
A notation indicating the elements in a compound and the ratios of the atoms of each element.
What is a chemical formula?
In experiment 4.1 we discovered that the _____ of water gives it many important qualities.
What is polarity?
Water cannot dissolve gasoline because it is made up of these type of molecules.
What are nonpolar molecules?
This famous scientist theorized that all matter is made of atoms, and that different substances are made from different combinations of atoms.
Who is Dalton?
I am the force of attraction between molecules of different substances so that they tend to stick together.
What is adhesion?
The energy stored in chemical bonds.
What is chemical energy?
In experiment 5.1 we noted that this type of chemical reaction occurs when a compound breaks down into two or more similar substances.
What is a decomposition reaction?
This type of ion is a covalently bonded group of atoms that has a positive or negative charge and acts as a unit.
What is a polyatomic ion?
Energy is measured in units called joules(J) named after this 19th century English physicist.
Who is James Joule.
I am a chemical reaction that releases energy to its surroundings.
What is an exothermic reaction?
The distance an object travels plus the direction from the starting point.
What is displacement?
In experiment 6.1, using eggs, we found that ______ tells us how quickly and in what direction an object is moving in relation to a reference point.
What is velocity?
The slope of the line on a speed-time graph shows this.
What is the acceleration?
This saint listed the presence of motion as one of the five arguments for the existence of God.
Who is St. Thomas Aquinas?
I am a point against which direction is measured.
What is a reference point?