The Periodic Table – Homework Answers
After you have completed the Periodic Table Homework, you can refer to these answers. Although it is better to have known the answer from your reading, the process of writing the correct answer on your homework sheet will help you remember the concepts.
1. Why is the Periodic Table useful?
It organizes the elements into groups of similar chemical properties.
2. Which is NOT an element: Hydrogen, Iron, or Carbon Dioxide?
Carbon Dioxide.
3. What is Gold’s shorthand symbol?
Au
4. How many natural elements are there?
92
5. What is the most important factor in determining an element’s chemical properties?
.The number of electrons in the outer shell.
6. What determines how many electrons an element has in its outer orbit?
The atomic number and the previously filled orbits.
7. Na and K are in the same column. How are they similar?
They have similar chemical properties.
8. What determines a noble gas?
Its outer shell is filled.
9. Which is NOT a trait of metals?
a. A good insulator
10. Why would a nonmetal tend to gain electrons?
Usually, the outer shell is short of being filled.
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