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  2. Periodic Table Groups vs. Periods | Properties & History

    study.com/learn/lesson/periodic-table-period-vs-group.html

    The Periodic Table of Elements is a widely used tool in chemistry. The Periodic Table is an organized model that includes all of the elements scientists have discovered throughout history ...

  3. Ionization Energy | Definition, Trends & Factors - Lesson -...

    study.com/academy/lesson/ionization-energy-trends-among...

    The periodic table of elements is organized in a way that creates an ionization energy trend. The periodic table is organized into groups and periods. Groups are the columns on the table, and ...

  4. Effective Nuclear Charge | Overview, Formula & Trends

    study.com/academy/lesson/effective-nuclear-charge-periodic...

    The periodic table is the arrangement of elements in rows and columns according to atomic numbers. Each element has its own unique atomic number. Here you can see gold, and there are two numbers ...

  5. Electronegativity | Definition, Periodic Trend & Example

    study.com/.../electronegativity-trends-periodic-table.html

    A period is a row on the periodic table. As you move across a row, you will find a similar trend in electronegativities as you did when you went down a column. Smaller atoms are going to have ...

  6. Group 4A Elements Overview & Properties - Study.com

    study.com/academy/lesson/group-4a-elements-definition...

    Germanium. Germanium is the third of the Group 4A elements. Its symbol is Ge and its atomic number is 32. It is in the fourth period of the periodic table. It is a hard, crystalline, grayish-white ...

  7. Periodic Table Metals | Definition, Reactivity & Examples

    study.com/academy/lesson/metals-on-the-periodic-table...

    Lanthanides are also found in the middle of the periodic table. The first period of the f-block represents the lanthanides that lie in six periods. Lanthanides range from atomic number 57 to 71.

  8. Periodic Table Groups vs. Periods | Properties & History -...

    study.com/academy/practice/quiz-worksheet-properties-of...

    The periodic table is an important tool used to organize the known elements, and this quiz/worksheet combination will help you test your knowledge on how the periodic table is organized.

  9. Group 5A Elements | Chemical Properties & Importance

    study.com/academy/lesson/group-5a-elements-definition...

    Group 5A Elements on the Periodic Table: Overview. Group 5A of the periodic table of elements, also known as group 15, nitrogen group, or pnictogens, is the set of chemical elements represented in ...

  10. Atomic & Ionic Radius Trend | Definition, Differences & Chart

    study.com/academy/lesson/atomic-and-ionic-radii-trends...

    The trend for atomic radius is observed on the periodic table of elements. Moving down a group or column atoms increase in atomic radius. Moving right across a period the atoms decrease in atomic ...

  11. Noble Gases on the Periodic Table | Group 8A Elements

    study.com/academy/lesson/noble-gases-group-8a-elements...

    Elements that are in Group 18 (VIIIa) of the periodic table are called noble gases. They include Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), and Radon (Rn). Lightest of all the ...