Is NA and RB in the same group?
Group 1A (or IA) of the periodic table are the alkali metals: hydrogen (H), lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Salts of the Group 1A elements tend to be extremely soluble in water. …
What is Li Na K Rb Cs Fr?
Li, Na, K, Rb, and Cs are all group IA elements, also known as the alkali metals. The seventh member of the group, francium (Fr) is radioactive and so rare that only 20 atoms of Fr may exist on Earth at any given moment.
What are the element names for Rb Cs and Fr?
The alkali metals are six chemical elements in Group 1, the leftmost column in the periodic table. They are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr).
Where is Ca and Ba on the periodic table?
Group 2A — The Alkaline Earth Metals. Group 2A (or IIA) of the periodic table are the alkaline earth metals: beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). They are harder and less reactive than the alkali metals of Group 1A.
What is the softest alkali metal?
Potassium is the softest.
Which of the following is the most reactive Li K Na RB?
So, as all the metals listed in the options belong to group 1 so the activity of the element at the bottom amongst the given ones will be most active. Hence, rubidium is the most active amongst the given options. So, the correct answer is option D. Note- On the periodic table the most reactive element is the francium.
What do Li Na and K have in common?
Li, Na and K all ended up in the Alkali Metals group because of this pattern that grouped similar elements. They have similar chemical properties because they all have one valence electron which they lose easily to form a +1 ion. They all react vigorously with water to form hydrogen gas and hydroxide ion.
Why is potassium called K?
The name derives from the English “potash” or “pot ashes” because it is found in caustic potash (KOH). The symbol K derives from the Latin kalium via the Arabic qali for alkali. It was first isolated by the British chemist Humphry Davy in 1807 from electrolysis of potash (KOH).
What element does CA stand for?
Calcium
Calcium (Ca), chemical element, one of the alkaline-earth metals of Group 2 (IIa) of the periodic table.
Which is more metallic K or CA?
Among K, Mg, and Ca, K (potassium) will be more metallic because it is an alkali metal. Calcium will be more metallic than magnesium because calcium comes in period 4 of group 4 and magnesium comes in period 3 of group 2.
What is the softest metal?
Cesium
Cesium is a rare, silver-white, shiny metal with brilliant blue spectral lines; the element’s name comes from “caesius,” a Latin word meaning “sky blue.” It is the softest metal, with a consistency of wax at room temperature.
