دوری درجہ بندی

Ionisation energy generally across a period from left to right:

• 1 Decreases
• 2 Increases
• 3 Stays constant
• 4 Becomes zero

Which element has the highest electronegativity?

• 1 Fluorine
• 2 Oxygen
• 3 Nitrogen
• 4 Chlorine

Atomic radius down a group:

• 1 Decreases
• 2 Is constant
• 3 Doubles each time
• 4 Increases

Which of these has the largest radius?

• 1 Na
• 2 Cl
• 3 Mg
• 4 Al

Electron affinity is the energy change when an atom:

• 1 Gains a proton
• 2 Gains an electron
• 3 Gains a neutron
• 4 Loses an electron