Question

I need the 3 questions !!! About Rubidium (Rb) ASAP PLEASE DUE IN LIKE 20 min

Answer 1

Answer:

1. 419kJ/mol  
2. 5,0,0,+12
3. That catches fire spontaneously

Explanation:

1. Topic: Chemistry

ElementFirst Ionization Energy (kJ/mol) Lithium520Sodium496Rubidium403Cesium376According to the above table, which is most likely to be the first ionization energy for potassium?  

• 536kJ/mol  

• 504kJ/mol  

• 419kJ/mol  

• 391kJ/mol  

• 358kJ/mol

2. Topic: Chemistry, Atom

The correct set of four quantum numbers for the valence electrons of the rubidium atom   (Z=37)  is:  

• 5,1,1,+12  

• 5,0,1,+12  

• 5,0,0,+12

• 5,1,0,+12

3. Rubidium and cesium are pyrophoric. Here the term pyrophoric means:

• That hardly catches fire

• That does not catch fire at all

• That catches fire spontaneously

• None of these