Periodicity

Which of the following elements contains 8 atoms in a molecule?

• carbon

• fluorine

• phosphorus

• sulfur

The element neon has which type of structure?

The main reason that sodium has a larger covalent radius than lithium is because

• sodium has more protons

• sodium has more neutrons

• sodium has more electron shells

• sodium has a higher atomic mass.

Carbon in the form of fullerenes has covalent ____________________ bonding.

Which of the equations shown represents the first ionisation energy for chlorine?

• Cl --> Cl⁺ + e^-

• Cl₂ --> 2Cl⁺ + 2e^-

• Cl(g) --> Cl⁺(g) + e^-

• Cl₂(g) --> 2Cl⁺(g) + 2e^-

Electronegativity is a measure of the attraction an atom has for ______________ electrons.

Which of the following elements has the structure shown in the diagram.

• Helium

• Beryllium

• Boron

• Carbon

As you go across a period, the first ionisation energy _________________.

Where does the attraction in London dispersion forces occur?

• Between temporary and induced dipoles.

• Between positive ions and delocalised electrons.

• Between nuclei and shared electrons.

• Between oppositely charged ions.

The enthalpy change for the reaction shown is ____________ kJ mol^-1.

Mg⁺(g) --> Mg⁴⁺(g) + 3e^-