55 is the atomic number of the element caesium
Cesium is in period 6, group 1. Its atomic number is 55. Its symbol is Cs.
Cesium is a chemical element located in Group 1 and Period 6 of the periodic table. It is an alkali metal with the symbol Cs and atomic number 55.
Vanadium Niobium Tantalum
there are 55 protons Cs in the periodic table .
There are fifteen rare earth metals?æ in period 6. They are lanthanum, Cerium, Praseodymium, Neodymium, Promethium, Samarium, Europium, Gadolinium, Terbium, Dysprosium, Holmium, Erbium, Thallium, Ytterbium and Lutetium.
I believe there were 55 or 56 known elements then.
Cesium. See the link below for a periodic table
The element with atomic number 55 on the periodic table is cesium.
Caesium (Ce) is atomic number 55 of the Periodic Table of the Elements. Ce belongs to Group I and is 132.9 grams per mole.
Caesium (At no. 55).
For information about the 7.2 Periodic Puzzle: -pg 55 Table 1: The Mystery Elements: - refer to this link: http://www.glencoe.com/mhlnob/assets/00077001/pdf/00077415.pdf -pg T230
Period 5 in the periodic table includes elements from 37 (Rb) to 55 (Cs). This period consists of transition metals, lanthanides, and actinides, as well as nonmetals and metalloids like iodine and tellurium. Elements in period 5 generally have increasing atomic numbers and atomic masses from left to right.
55 - No. of protons and neutrons Manganese 25 - No. of protons
Cesium is in period 6, group 1. Its atomic number is 55. Its symbol is Cs.
Cesium is a chemical element located in Group 1 and Period 6 of the periodic table. It is an alkali metal with the symbol Cs and atomic number 55.
The element with 55 electrons is Caesium (Cs). Caesium is an Alkali Metal in Period 6 of the Periodic Table. It has the atomic number 55. It has 55 electrons in 6 shells with 1 electron in the outer shell.
Vanadium Niobium Tantalum