- Calcium (Wikipedia)
Calcium is a chemical element; it has symbol Ca and atomic number 20. As an alkaline earth metal, calcium is a reactive metal that forms a dark oxide-nitride layer when exposed to air. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. It is the fifth most abundant element in Earth’s crust, and the third most abundant metal, after iron and aluminium. The most common calcium compound on Earth is calcium carbonate, found in limestone and the fossilised remnants of early sea life; gypsum, anhydrite, fluorite, and apatite are also sources of calcium. The name derives from Latin calx “lime”, which was obtained from heating limestone.
- I am honored to nominate Chairwoman Elise Stefanik to serve in my Cabinet as United States Ambassador to the United Nations. Elise is a strong and very smart America First fighter. She graduated from Harvard University, with honors, was the youngest woman ever elected to Congress, and is the highest ranking woman in Congress, as the House Republican Conference Chair. She was the first Member of Congress to endorse me, and has always been a staunch advocate. Elise is a senior Member of the House Armed Services Committee, the House Intelligence Committee, and led the charge against antisemitism on college campuses. She will be an incredible Ambassador to the United Nations, delivering Peace through Strength and America First National Security policies!