Properties & Reactivity

The Properties

As I had listed before, Einsteinium's property is primarily a mystery to scientist. However, they had conducted some studies of ²⁵³Es, an isotope of Einsteinium. The study indicate that the chemical properties of Einsteinium correspond a regular actinide element. The common properties that all actinide elements share are: radioactivity, highly electropositive and the ability to combine with non-metal. 

Physical Properties: 
Atomic mass: 252 u
State of matter: Solid
Appearance: Soft silvery white metal
Density (near room temperature): 8.84g/cm^3
Melting Point (): 860°C
Shells: 2,8,18,32,29,8,2

Chemical Properties: 
Electronegativity: 1.3 (Pauling Scale)
Ionization Energy: 619kj/mole
Highest Occupied Energy Level: 7

^{Electronegativity of Einsteinium}
An atom tends to attract electron toward itself when bonding with another atom. The level of attraction of each atom is called electronegativity. The electronegativity have different values for  different elements. The value of electronegativity of Einsteinium is 1.3. If the value is 0, it means the atom have no attraction whatsoever to the electron. Thus, the electrons would fly off into space. However, if the value 4.0, it means the attractive force of the atom with the electron is incredibly strong. Electronegativity values are normally between 0 and 4.0. Einsteinium has electronegativity of 1.3, so the force is relatively weak. 

Ionization Energy of Einsteinium
The energy required to remove electrons from an atom is called ionization energy. Ion is an atom or molecule with an amount of protons that don't equal to the amount to electrons. The energy required to remove the first electron is called the 'First Ionization Energy'. The energy required to remove the second electron is called the 'Second Ionization Energy' and so forth.

The further away the electron is from the atom's nucleus, the simpler it is to remove the electron. Einsteinium has 99 electrons. Therefore, it is very easy to remove electrons from Einsteinium.  

The Reactivity

The amount of Einsteinium that scientists currently have is inadequate to allow them to explore the physical and chemical reaction of the element with other elements. Although, by observing the other actinides, scientists are confident that Einsteinium is reactive. All actinides are highly reactive with halogens and chalcogens. These actinides are reactive and unstable due to atomic number greater than 83.