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).

Which of the following is correct order of electronegativity Cs Rb Na?

As we move from top to bottom in group the electron-affinity will be decreased, because the atomic radius will be increased so distance from outer electrons to the nucleus will be increased,so the electrons will be difficultly added Li, Na, K, Rb, Cs are IA group elements from Li to Rb the electronegativity will be …

What is the lightest element on earth?

hydrogen
11.2 Properties of hydrogen. Hydrogen is the lightest element. Dihydrogen, H2, is a colorless, odorless, tasteless gas. The properties of hydrogen are summarized in Table 11.1.

Does RB have a higher electronegativity than na?

For example, sodium has an electronegativity of 0.93 and chlorine has an electronegativity of 3.16, so when sodium and chlorine form an ionic bond, in which the chlorine takes an electron away from sodium, forming the sodium cation, Na+, and the chloride anion, Cl-….Periodic Trends — Electronegativity.

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).

Is Na or K more electronegative?

Sodium has a higher electronegativity than Potassium. The further the electron density is from the positive nucleus the lower the electronegativity, The smaller the positive charge on the nucleus the lower the electronegativity.

Which is more electronegative K or Rb?

Electronegativity (EN) decreases with Z so that for K and for Rb-85: EN=0.9Z^-0.03 giving 0.820 and 0.807 respectively.

Which is the lightest gas in the world?

Helium is the second most abundant element in the universe, after hydrogen. Helium has monatomic molecules, and is the lightest of all gases except hydrogen. . Helium, like the other noble gases, is chemically inert.