IB Chemistry - Structure 3

Which subatomic particles are involved in the formation of an ion?

• Neutrons

• Electrons

• Protons

• All of the above

Which element has the highest first ionisation energy?

• Na

• Cl

• F

• K

What trend is observed across a period in the periodic table for atomic radius?

• Increases

• Decreases

• Stays constant

• Varies randomly

Which of the following best explains why ionisation energy decreases down a group?

• Nuclear charge increases

• Electron shielding increases

• Atomic radius decreases

• Electronegativity increases

Which ion is isoelectronic with neon?

• Na⁺

• Cl⁻

• O²⁻

• Mg²⁺

What happens to electronegativity across a period?

• Decreases

• Increases

• Stays the same

• First increases then decreases

Which element has the largest atomic radius?

• Li

• Na

• K

• Rb

Which species has the smallest radius?

• F⁻

• Ne

• Na⁺

• Mg

Which group in the periodic table contains elements with a full outer shell?

• Group 1

• Group 2

• Group 7

• Group 18

What is the electron configuration of a chloride ion (Cl⁻)?

• [Ne]3s²3p⁴

• [Ne]3s²3p⁵

• [Ne]3s²3p⁶

• [Ar]