For January, it’s atomic No. 1


We celebrate the International Year of the Periodic Table of Chemical Elements (the 150th anniversary of the first publication of Russian chemist Dmitri Mendeleev’s periodic table) by highlighting an element each month in 2019. For January, it’s hydrogen.

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For February, it’s iron — atomic No. 26


To mark the second month of the International Year of the Periodic Table of Chemical Elements, Quira Zeidan writes about iron, the most abundant element on earth.

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For March, it’s a renal three-fer: sodium, potassium and chlorine


Quira Zeidan marks National Kidney Month and the third month of the International Year of the Periodic Table of Chemical Elements with a focus on three elements central to renal function: sodium, potassium and chlorine.

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For April, it’s copper — atomic No. 29


In the fourth month of the International Year of the Periodic Table of Chemical Elements, we focus on copper, atomic No. 29, the third most abundant metallic element in biological systems.

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For May, it’s in your bones


May is arthritis awareness month, so Quira Zeidan focuses on the elements calcium and phosphorus, the two components of the mineral salt hydroxyapatite, which makes up about 65 percent of human adult bone mass.

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