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EnchantedLearning.com Table of Elements Use the table to answer the questions. |
Name_________________________ |
| Element | Symbol | Number of Protons (Atomic #) |
Number of Electrons | Number of Neutrons (most stable isotope) |
Atomic Mass (most stable isotope) |
Type of Element |
|---|---|---|---|---|---|---|
| Hydrogen | H | 1 | 1 | 0 | 1 | non-metal |
| Helium | He | 2 | 2 | 2 | 4 | noble gas |
| Lithium | Li | 3 | 3 | 4 | 7 | alkali metal |
| Carbon | C | 6 | 6 | 6 | 12 | non-metal |
| Oxygen | O | 8 | 8 | 8 | 16 | non-metal |
| Silicon | Si | 14 | 14 | 14 | 28 | metalloid |
| Chlorine | Cl | 17 | 17 | 18 | 35 | halogen |
| Calcium | Ca | 20 | 20 | 20 | 40 | alkaline earth metal |
| Manganese | Mn | 25 | 25 | 30 | 55 | transition metal |
| Iron | Fe | 26 | 26 | 30 | 56 | transition metal |
| Lead | Pb | 82 | 82 | 125 | 207 | post-transition metal |
| Gold | Au | 79 | 79 | 118 | 197 | transition metal |
1. What is the chemical symbols for iron, lead, and gold? _____________________________
2. Which element has the fewest protons? _____________________________
3. In this table, which element has the most neutrons? ___________________
4. Which element in this table is a noble gas? _______________________
5. Which element has 26 protons? ___________________
6. Which elements have 30 neutrons? _____________________________
7. The atomic number (# of protons) uniquely determines an element. Does the number of neutrons determine an element? _____________________________
8. A proton has a positive charge; an electron has a negative charge. The number of protons and the number of
_____________________________ is the same (this gives the atom a neutral charge).
9. How many protons plus neutrons does chlorine have? _____________________________
10. The protons and neutrons are located in the nucleus of an atom; tiny electrons surround the nucleus. Atomic mass is essentially the weight of the atomic nucleus; it is the number of protons plus the number of _____________________________.
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