Which of the following elements would you expect to have chemical properties similar to Fluorine (F)? A Argon (Ar), because they are both noble gasses.

B Beryllium, (Be) because they are in the same period.

C Chlorine (Cl), because they are found in the same group.

D Neon (Ne), because they have almost the same number of protons.

1) this is the structure in the cell nucleus that houses a cell's genetic information

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space

)benzene and toluene form nearly ideal solutions. consider an equimolar solution of benzene and toluene. at 20 °c the vapour pressures of pure benzene and toluene are 9.9 kpa and 2.9 kpa, respectively. the solution is boiled by reducing the external pressure below the vapour pressure. calculate (i) the pressure when boiling begins, (ii) the composition of each component in the vapour, and (iii) the vapour pressure when only a few drops of liquid remain. assume that the rate of vaporization is low enough for the temperature to remain constant at 20 °c.