Q1) Fluorine and astatine are halogens. Use your knowledge of the other halogens to
predict the following:
(i) - The physical state of fluorine at r. t.p. [1]
- The physical state of astatine at r. t.p. [1]
(ii) Two similarities in their chemical properties [2]
(iii) Explain the trend in reactivity of the halogens. [2]​

Cucl2 + 2nano3 cu(no3)2 + 2nacl what is the percent yield of nacl if 31.0 g of cucl2 reacts with excess nano3 to produce 21.2 g of nacl? 49.7% 58.4% 63.6% 78.7%

In vapor-liquid equilibrium in a binary mixture, both components are generally present in both phases. how many degrees of freedom are there for such a system? the reaction between nitrogen and hydrogen to form ammonia occurs in the gas phase. how many degrees of freedom are there for this system? steam and coal react at high temperatures to form hydrogen, carbon monoxide, carbon dioxide, and methane. the following reactions have been suggested as being involved in the chemical transformation:

The sum of the oxidation numbers in a neutral compound is always