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ATOMS AND ELEMENTS (II) CHEMACTIVITY 4B
MODEL 1: WHAT DEFINES AN ELEMENT? Element Symbol Number of Protons silicon Si 14 phosphorus P 15 potassium K gold Au 79 Sb
CRITICAL THINKING QUESTIONS 1. Write the symbol for the element silicon. 2. Write the symbol for the element phosphorus. 3. Write the symbols for the element potassium. 4. Describe the relationship between the name of an element and its symbol.
5. When the name of an element is written in a sentence, is it capitalized? How do you know?
6. Describe the proper use of capitalization for element symbols.
7. Refer to a periodic table of the elements. What is the name of the element with the symbol Sb? Add it to the table.
8. How many protons are there in silicon? Gold?
9. Refer to a periodic table of the elements. Using a complete sentence, describe how to find the number of protons for an element.
10. How many protons are there in potassium? Antimony? Add them to the table.
11. A certain element has eight protons. What element is it?