Atomic Structure and Elements
Vocabulary
Chemical Compounds
Physical Properties
Acids and Bases
100
What is the smallest piece of matter that still has the properties of the element?
An Atom
100
What is matter?
Matter is something that is made up of atoms and takes up space.
100
Which compound is H20?
Water
100
What is texture?
How a surface feels
100
If the pH is 9, what color will the litmus paper turn? Why
Blue because it is a base.
200
Which part of an atom has a negative charge?
An electron
200
What is the temperature at which a solid changes to a liquid called?
Its melting point
200
Which compound is NaCL?
salt
200
Whether an object floats in a liquid or water is called what?
Its buoyancy
200
Which type of compound has a pH lower than 7?
An acid
300
What does the atomic number tell you about an element?
The number of protons in the element
300
What is the amount of matter present in an object called?
Its mass
300
What is the only thing that can separate a compound into its separate elements?
A chemical reaction
300
What is ductility?
The ability to be drawn into wires
300
What will you get when you mix a chemical with a pH of 12 and a chemical with a pH of 1?
Salt water or a neutral solution
400
What do you call the table where elements are organized by increasing atomic number?
The Periodic Table
400
What do you call two or more atoms (of the same or different elements) that are bonded together?
A molecule
400
What names the elements and how many atoms of each type of element?
The chemical formula
400
Which item will float in air? (see chart) Why?
Hydrogen gas Because it is less dense than air
400
What do you use to show if a chemical is acidic or basic?
An indicator or litmus paper
500
What do you call the group of elements on the right side of the periodic table (group 18)?
Noble Gases
500
What is the amount of space that a substance takes up called?
The volume
500
Properties that describe the ability of a substance to react with other materials and form new substances are called what?
Chemical Properties
500
Which on of these items will float in water? (see image) Why?
Gasoline Because it is less dense than water
500
Name three acids and two common uses for acids.
vinegar (acetic acid), citric acids, stomach acids, hydrochloric acid, sulphuric acid They are used in batteries and fertilizers.
M
e
n
u