When you are doing a flame test you are using a solution of
positive metal cations and negative metal anions. The reason a
color is observed is that during the flame test the positive ion
can
The UK Government's Private Finance Initiative is a form or
private/public partnership arrangement for the financing and
construction of public infrastructure. It does allow the government
to economically fund important infrastructure, it does expose the
government to risk if the corporation fails or otherwise has
problems.