Identify the element that lies in Group VI and Period 4.
Explain, in terms of outer-shell electron numbers and electron transfer, how calcium atoms and chlorine atoms make ions. State the ion formulae.
Suggest the approximate boiling point of $\text{PCl}_3$.
Explain the trend in boiling points using attractive forces between particles.
Complete the dot-and-cross diagram to show the electron arrangement in a molecule of $\text{PCl}_3$. Show only the outer electrons.
Describe two characteristics of an equilibrium.
State the effect, if any, on where this equilibrium lies when the following changes are made. Explain your answers. temperature is increased pressure is increased
Explain, in terms of particles, how the rate of the forward reaction changes when the reaction mixture is heated.
Calculate the mass of LiF required to make 3.04 g of $\text{LiPF}_6$ by following these steps. Calculate the number of moles of $\text{LiPF}_6$ formed. [$M_r$: $\text{LiPF}_6$, 152] Work out the number of moles of LiF needed. Calculate the mass of LiF needed.
What is the definition of an ionic bond?
Give two physical properties shown by ionic compounds.