Spring Break Homework- 8^th Grade

Remember atoms are composed of subatomic particles.

1. How are atoms structured?

2. What are the locations, masses and electrical charges of the subatomic particles?

3. Where are valence electrons located?

Protons determine the Atom’s identity.

1. How is the identity of an electron determined?

　

2. What is the importance of protons?

　

3. Why are protons used to determine the identity of an element?

　

4. Draw the Bohr model for the following elements:

　Chlorine                                           Sodium                                                  Iron

       Cl                                                     Na                                                         Fe
　
　
　
　
　
　
　
The periodic table is arranged by atomic number and shows many trends.

1. What are some patterns (trends) found in the periodic table of elements?

2. How are elements on the periodic table organized?

　

3. Where are groups located on the periodic table?

4. Where are periods located on the periodic table?