Why Sodium Metal Is Used In Photoelectric Effect? This is because the valence electron are loosely bound to the nucleus of atom and are easily liberated by absorbing small amount of energy. Why sodium is used in photoelectric effect? A sodium photoelectric surface with work function 2.3eV is illuminated and emits electrons. The electrons travel
What Are Common Physical And Chemical Features Of Alkali Metals? – They are light in color. – Due to their large atomic size, they have low density. – They have low melting & boiling point due to weak metallic bonding. … Each alkali metal shows properties such as Increased atomic radius, decreased electronegativity and decreased
Which Is The Largest Element In Modern Periodic Table? The largest element of the periodic table is Francium. Which element has the largest atomic? Atomic radii vary in a predictable way across the periodic table. As can be seen in the figures below, the atomic radius increases from top to bottom in a group, and
Which Is The Most Reactive Element And Why? The most reactive elementary group is alkali metals (situated far apart from intermediate metals and noble gases). Cesium is second from the bottom of this group, has 6 shells of electrons, and it matches the features of a reactive atom, making it the most reactive element. Which
Why Are They Called Alkali Metals? The alkali metals are so called because reaction with water forms alkalies (i.e., strong bases capable of neutralizing acids). Why alkali metals are called so? All the Group 1 elements are very reactive . They must be stored under oil to keep air and water away from them. Group
Which Group On The Periodic Table Is Highly Reactive In Water? The alkali metals (Li, Na, K, Rb, Cs, and Fr) are the most reactive metals in the periodic table – they all react vigorously or even explosively with cold water, resulting in the displacement of hydrogen. Which elements are highly reactive water? Water reactive
Why Does The S Block Span 2 Groups? Why does the s-block span two groups of elements? Because s orbitals hold two electrons at most. … Because the three p orbitals can hold a maximum of six electrons. Why are there 2 groups of elements in s-block? s-block elements are the elements found in Group
Which Properties Are Characteristic Of The Group 2 Metals? Being a metal, they are obviously good conductors of heat and electricity. The general electronic configuration of Group 2 elements is ns2. Alkali earth metals have the capability to lose the two electrons in their outer shell. Which properties are characteristics of Group 2 elements? Although
Why Does Group 1 Have The Largest Atomic Radius? Element lithium Atomic Number (Z) 3 Symbol Li Simple Electron Configuration 2,1 Why do alkali metals have the largest radius? Alkali metals have largest covalent radii because they poses only 1 electron in their outer level and good screening in inner level and that results lower
What Is The Reactivity Of Group 1? The reactivity of Group 1 elements increases as you go down the group because: … the outer electron gets further from the nucleus as you go down the group. the attraction between the nucleus and outer electron gets weaker as you go down the group – so the