7 Written Questions

1. This is the number of neutrons plus protons.
2. Atoms of the same element with different numbers of neutrons
3. number of protons an atom has
4. 2 or more elements or compounds mixed together but not chemically combined.
5. Pure substances that can't be broken down.
6. The small number in a formula after a symbol
7. represent compounds like H2O for water

6 Multiple Choice Questions

1. Change in appearance but still same substance
   1. Physical change
   2. nucleus
   3. Atomic Number
   4. Chemical Change
2. outside nucleus, no mass negative charge
   1. Electrons
   2. Protons
   3. Elements
   4. Neutron
3. In nucleus mass of 1 amu neutral charge.
   1. Atom
   2. Neutron
   3. Protons
   4. Electrons
4. Smallest particles of matter
   1. Ions
   2. Neutron
   3. Atom
   4. Protons
5. Evenly mixed such as saltwater
   1. Isotopes
   2. Compounds
   3. Heterogeneous
   4. Homogeneous
6. In nucleus mass of 1 amu positive charge.
   1. Isotopes
   2. Protons
   3. Atom
   4. Ions

6 True/False Questions

1. Symbols → Atoms with more or less electrons than protons

   True        False

2. Ions → Atoms with more or less electrons than protons

   True        False

3. Heterogeneous → Not evenly mixed

   True        False

4. Chemical Change → Change to a new substance with new properties

   True        False

5. nucleus → Stands for an element.

   True        False

6. Compounds → Two or more elements chemically combined.

   True        False