Once upon a time, there was a boy named Bohr. He had a dream of becoming one of the world's finest scientists.
Bohr was a very adorable little boy, and one day, after he kissed goodnight with his mommy and daddy, he went to sleep. This night would leave an erasable mark on his life.
The next morning little Bohr opened his eyes, he found that he was not in his bedroom, rather he was in a place he would describe as "magical." Little Bohr was frankly scared, in fact, he might have peed a little in his pants.
Far in the horizon, an old bearded man was walking towards little Bohr.
"My name is Mendeleev Dmitri", the old man said to small Bohr, "I'd been trapped for decades!" He turned around, facing the boundless unknown land, "Now, I need you to help me solve the secret of elements!!!!"
Bohr was afraid of this creepy old man, but he couldn't resist devoting himself to "elements". He agreed.
"I am the great founder of the Periodic Table, a tabular display of the chemical elements." Mendeleev continued, "Many of the greatest chemists and physicists worked together to create the magical periodic table of elements."
"How did you guys develop the periodic table?"
"I first organized the elements through their atomic masses, as this would create a table of elements with similar properties being close together. However, my good friend Moseley continued my work and reorganized the periodic table, arranging the elements through their atomic number, which is the number of protons in an element."
Chapter 2: Characteristics of the periodic table
"The vertical columns, AKA groups, are arranged such that all its elements have the same number of valence electrons. All elements within a certain group thus share similar properties."
Mendeleev continued, "Elements are listed in order of increasing atomic number from left to right. Each row of the periodic table is called a period. The elements among the same period share similar properties as in the same group."
"The metals are to the left of the line (except for hydrogen, which is a nonmetal), the nonmetals are to the right of the line, and the elements immediately adjacent to the line are the metalloids."
"Metals are generally shiny, malleable, and hard. Metals are also good conductors of electricity. Non-metals do not conduct heat or electricity very well. Non-metals are typically brittle and not easily moulded into shapes. Metalloids share characteristics of both metal and non-metals. Metalloids are typically semi-conductors, meaning they both insulate and conduct electricity".
"Most of the metals are solids at room temperature, with a characteristic silvery shine, except for mercury, which is a liquid. "
"Many of the elemental nonmetals are gases at room temperature, while others are liquids and others are solids. "
"The metalloids are intermediate in their properties. In their physical properties, they are more like the nonmetals, but under certain circumstances."
Bohr was astonished. "The arrangement of electrons is so magical." Bohr couldn't close his mouth. "I love chemistry so much. I can't believe how the periodic table can organize so different elements into groups that make them seem so similar."