Metallic and non-metallic character-CHM50A

Which of the following is true about an atom with an electronic structure [Ne] 3s2 3p5? 

I. It is a non-metal 

II. It belongs to Period 3 

III. It is a p-block element 

IV. It has 7 valence electrons 

• I, II and III 

• I, III and IV 

• II, III and IV 

• I, II, III and IV 

Which reaction below represents the first ionization of oxygen? 

• 
• 
• 
• 

Place the following in order of decreasing metallic character; P, As and K. 

• K > As > P  

• As > P > K 

• P > As > K 

• As > K > P 

Which of the following statements is true? 

• A fluorine atom has bigger first ionization energy than the oxygen atom 

• A neon atom has a smaller radius than the oxygen atom 

• A cesium atom has smaller first ionization energy than the lithium atom 

• All of the them

From the given successive ionization energies.

To which third period element do these values belong? 

• Al

• Na

• Mg

• Si

Which element is the most reactive? 

• A

• W

• X

• A and W