Periodic Table

The periodic table is a tabular arrangement of the chemical elements organized by their atomic number, electron configuration, and recurring chemical properties. The table is divided into periods (rows) and groups (columns) which help to classify and organize the elements based on their properties.

Structure of the Periodic Table

The periodic table is arranged in a specific way. Elements are ordered by increasing atomic number and grouped together based on similar properties. The table is divided into several sections:

Periods: There are 7 periods in the periodic table, each representing a different energy level or shell in which the electrons of the elements reside.
Groups: The elements in the periodic table are also arranged into 18 vertical columns called groups or families. Elements in the same group share similar chemical properties.
Blocks: The periodic table is divided into s-block, p-block, d-block, and f-block based on the type of orbital that receives the last electron in that element.

Properties of Elements

By looking at the periodic table, you can learn a lot about the properties of elements. For example:

Metals are located to the left of the periodic table, while nonmetals are found to the right.
Elements in the same group have similar properties. For example, Group 1 elements (alkali metals) are all very reactive.
As you move from left to right across a period, the elements become less metallic and more nonmetallic in nature.

Studying the Periodic Table

When studying the periodic table, it's important to focus on the following key points:

Understand the organization of the table, including periods, groups, and blocks.
Learn the properties and characteristics of different groups and periods.
Memorize the names and symbols of the first 20 elements.
Practice using the periodic table to find specific information about elements, such as atomic number, atomic mass, and electron configuration.
Understand how the periodic table is used to predict chemical behavior and properties of elements.

Conclusion

The periodic table is a fundamental tool in the study of chemistry, providing a systematic way to organize and understand the properties of the elements. By familiarizing yourself with its structure and using it as a reference, you can gain valuable insight into the behavior and characteristics of the various elements.

◂Science Worksheets and Study Guides Sixth Grade. Our impact on earth

Vocabulary/Answer key

Our impact on earth

The resources above cover the following skills:

EARTH AND SPACE SCIENCE

Earth’s Systems

Analyze and interpret data (e.g., tables, graphs, maps of global and regional temperatures; atmospheric levels of gases such as carbon dioxide and methane; rates of human activities) to describe how various human activities (e.g., use of fossil fuels, creation of urban heat islands, agricultural practices) and natural processes (e.g., solar radiation, greenhouse effect, volcanic activity) may cause changes in local and global temperatures over time.

Earth and Human Activity

Analyze evidence (e.g., databases on human populations, rates of consumption of food and other natural resources) to explain how changes in human population, per capita consumption of natural resources, and other human activities (e.g., land use, resource development, water and air pollution, urbanization) affect Earth’s systems.

Implement scientific principles to design processes for monitoring and minimizing human impact on the environment (e.g., water usage, including withdrawal of water from streams and aquifers or construction of dams and levees; land usage, including urban development, agriculture, or removal of wetlands; pollution of air, water, and land).