Show:
Atoms
Elements
Compounds & Reactions
Bonding
Acids & Bases
100
These particles are found in the center of an atom
What are protons and neutrons?
100
Abbreviations for the names of the elements
What are chemical symbols?
100
Uses chemical symbols and numbers to abbreviate the name of a compound
What is a chemical formula?
100
An atom that has lost or gained electrons
What is an ion?
100
These substances measure from 0-6.9 on the pH scale
What are acids?
200
Number of protons in an atom
What is atomic number?
200
Horizontal rows of the periodic table
What are periods?
200
A group of atoms joined together
What is a molecule?
200
Type of bond formed when atoms share electrons
What is covalent?
200
What acids form when dissolved in water
What are hydrogen ions?
300
This scientist developed a simple model of the atom
Who is Niels Bohr?
300
Scientist who developed the periodic table of elements
Who is Mendeleev?
300
Total number of atoms in a unit of chalk (CaCO3)
What is 5?
300
This family of elements rarely undergoes chemical reactions
What are the noble gases?
300
Bases that dissolve in water
What are alkalis?
400
What scientists use to classify each element
What is the atomic number?
400
3 examples of categories on the periodic table
What are metals, nonmetals, and metalloids?
400
Type of reaction in which elements combine
What is synthesis?
400
The factor that determines how atoms tend to form compounds
What is the number of electrons in the outer shells of the atoms?
400
2 natural substances that can act as indicators
What are beets and red cabbage?
500
Machines that smash atoms
What are particle accelerators?
500
What all the elements in a group have in common
What is the number of electrons in their outer shells?
500
Type of reaction in which 2 elements switch places
What is double replacement?
500
Type of bond found in most gas and liquid molecules
What is covalent?
500
What most salts are made of
What are a metal and a nonmetal?