6.1. How Elements Are Organized http://www.ck12.org
FIGURE 6.4
Like other periods, period 4 changes from metals on the left to metalloids and then nonmetals on the right.metalloids and then nonmetals on the right. Within groups, elements have similar properties.Lesson Review Questions
Recall
- How did Mendeleev organize the elements?
- How does the modern periodic table differ from Mendeleev’s table?
- What is a period in the periodic table?
- What is a group in the periodic table?
Apply Concepts
- An unknown element has an atomic number of 44. Identify the element’s symbol and the symbols of two
other elements that have similar properties.
Think Critically
- Mendeleev’s table and the modern periodic table organize the elements based on different information, yet
most elements are in the same order in both tables. Explain why.
Points to Consider
Elements are classified as metals, metalloids, or nonmetals.