Periodic Table Basics

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Questions and Answers

Elements in the same group tend to show similar chemical characteristics. Vertical, horizontal and diagonal trends characterize the periodic ______

table

The periodic table is divided into four roughly rectangular areas called ______

blocks

The first periodic table to become generally accepted was that of the Russian chemist Dmitri ______ in 1869

Mendeleev

The table is an icon of chemistry and is widely used in physics and other ______

sciences Signup and view all the answers

The periodic law was recognized as a fundamental discovery in the late 19th ______

century Signup and view all the answers

Match the following characteristics with the correct description:

Metallic character = Increases going down a group and decreases from left to right across a period Nonmetallic character = Increases going from the bottom left of the periodic table to the top right Periodic law = Dependence of chemical properties on atomic mass Dmitri Mendeleev = Formulated the periodic law as a dependence of chemical properties on atomic mass Signup and view all the answers

Match the following statements with their correct description:

Periodic table = Arranges the chemical elements into rows and columns based on their atomic numbers Atomic numbers = Used to arrange the elements in order and show an approximate recurrence of their properties Approximate recurrence of properties = Evident when the elements are arranged in order of their atomic numbers Blocks in the periodic table = Four roughly rectangular areas used to categorize the elements Signup and view all the answers

Match the following with their role in explaining the periodic law:

Discovery of atomic numbers = Helped understand the internal structure of the atom and validate the periodic law Quantum mechanics = Pioneering work in this field served to illuminate the internal structure of the atom and support the periodic law Gaps in Mendeleev's periodic table = Successfully used by Mendeleev to predict properties of some missing elements, supporting his formulation of the periodic law Missing elements in Mendeleev's table = Predicted properties using the periodic law, contributing to its recognition as a fundamental discovery Signup and view all the answers

Match the following with their role in chemistry and physics:

Periodic table = Widely used in physics and other sciences as an icon of chemistry Vertical, horizontal, and diagonal trends = Characterize the periodic table and help understand chemical and physical properties of elements Similar chemical characteristics in same group = Demonstrates trends in reactivity and behavior within the elements Metallic character trend = Provides insights into how reactivity changes within groups and across periods Signup and view all the answers

Match the following with their role in chemistry history:

Late 19th century discovery = Recognition of the periodic law as a fundamental discovery Early 20th century explanation = Discovery of atomic numbers and pioneering work in quantum mechanics served to explain the periodic law Mendeleev's contribution = Formulated the periodic law, used it to predict properties of missing elements, and created a widely accepted periodic table Internal structure of atoms = Illuminated by discoveries supporting and explaining the periodic law Signup and view all the answers

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