87
Fr
Francium
223,0 u
Francium
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الدورة
7
المجموعة
1
الكتلة
s-كتلة
الطور (STP)
Solid
Francium is the most unstable of the first 101 elements. It is extremely rare in nature, with at most 30 grams in Earth's crust at any time.
المزيد من فلز قلوي
Frequently Asked Questions
What is Francium?
Francium (Fr) is a chemical element with atomic number 87. It is a solid at standard temperature and pressure, classified as a فلز قلوي.
What are the key properties of Francium?
Francium has an atomic mass of 223.0 u.
What is the electron configuration of Francium?
The electron configuration of Francium is [Rn] 7s1. It is in the s-block of the periodic table.
What is the electronegativity of Francium?
Francium has an electronegativity of 0.7 on the Pauling scale.