Barium, since lutetium is also a metal. (At the next-to-rightmost column of this period is iodine, which may be as reactive as barium but is a nonmetal.)
Cesium, since barium and lutetium are also metals.
if you mean pure barium as in barium metal then yes it is very reactive if you left a piece of it out in the open air over night it would turn to a pile of white barium oxide and other various compounds
Absolutely; barium is a highly reactive metal.
Group 2 of the periodic table of elements: beryllium, calcium, barium strontium, magnesium, radium.
Element M can be a choice of 4 elements, Beryllium, Magnesium, Calcium, or Strontium. The element must have an oxidation of +2, which means group 2 elements. The atomic radius of a barium atom is 222pm. Radium has a larger atomic radius that Barium, so that is eliminated, and Barium is the same as Barium so that is also eliminated.
Cesium, since barium and lutetium are also metals.
It is number 56 on the Periodic Table of Elements
Barium (Symbol Ba) is itself an element. With the Atomic Number 56, it is an alkaline earth metal occupying the sixth period of the periodic table. It is highly reactive and hence is not found pure in nature. The soluble barium 2+ ion is poisonous, hence Barium is often used in rodenticides.
it is some sort of Compound found in elements on the periodic table
Ba. You'll find this in your copy of the periodic table of the elements.
As a start, try writing them as the "lanthanides". This group consists of the fifteen elements from lanthanum, with atomic number 57, through and including lutetium, with atomic number 71. In most periodic tables, they are in a separate row at the bottom of the table, often with a footnote reference at the spot on the table between barium and hafnium.
between Barium and Hafnium
if you mean pure barium as in barium metal then yes it is very reactive if you left a piece of it out in the open air over night it would turn to a pile of white barium oxide and other various compounds
Beryllium, Magnesium, Calcium, Strontium, Barium, Radium
Beryllium Magnesium Calcium Strontium Barium and Radium. These elements are Alkali Earth Metals
3BaCl2 is the molecular formula for barium dichloride. The 2 after the Cl indicates that the molecule has 2 chlorine atoms. The 3 in front of the molecule indicates that there are three specific barium chloride molecules.
The group 2 of elements (alkaline earth metals) in the periodic table of Mendeleev contain beryllium, calcium, magnesium, strontium, barium and radium.