Question

What is the element used to check one element at a time?

Answer 1

Royal Society of Chemistry - Periodic table

< Move to Helium Move to Beryllium >

Lithium

Lithium Element - Visual Elements Periodic Table

Discovery date 1817  

Discovered by Johan August Arfvedson  

Origin of the name The name is derived from the Greek 'lithos' meaning stone.  

Allotropes  

 

Li

Lithium

 3 6.94  

Fact box

Group 1  Melting point 180.50°C, 356.90°F, 453.65 K  

Period 2  Boiling point 1342°C, 2448°F, 1615 K  

Block s  Density (g cm−3) 0.534  

Atomic number 3  Relative atomic mass 6.94  

State at 20°C Solid  Key isotopes 7Li  

Electron configuration [He] 2s1  CAS number 7439-93-2  

ChemSpider ID 2293625 ChemSpider is a free chemical structure database

Answer 2

Answer:

$\huge\red{ANSWER}$

In the FEM, the structural system is modeled by a set of appropriate finite elements interconnected at discrete points called nodes. Elements may have physical properties such as thickness, coefficient of thermal expansion, density, Young's modulus, shear modulus and Poisson's ratio.