The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...

2.1. The alkali metals are a group in the periodic table consisting of the chemical elements lithium (Li), sodium (Na) etc. The alkali metals have very similar properties: they are all shiny, soft, ...

As you move from left to right across the periodic table, atoms have more electrons in their outer energy level and more protons in their nucleus. The greater attraction between the increased ...

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Just four years before Mendeleev announced his periodic table, Newlands noticed that there were similarities between elements with atomic weights that ... when an electron falls from a higher energy ...

That’s why this periodic table clock really caught our eye. [gocivici]’s idea is a simple one: light up three different elements with three different colors for hours, minutes, and seconds ...

Can you believe the periodic table has been around for over 150 years? Take this quiz to see if you can find the elements. What information do we collect from this quiz? The periodic table is a ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz. The periodic table of elements is a ...

Niba of SciShow explained how many Periodic Table elements actually exist in the human body and how these elements work to ...