4. In an experiment to separate a mixture of organic liquid "m" (B. P. 56°C) and liquid "n" (B. P. 118°C) a student set up the apparatus shown below.
Thermometer
Water in
Cork
Water out
Mixture of
M and N
111
Distillate
a) Identify two mistakes in the set up.
(2mks)
b) What method would the student use to test the purity of the distillates?
(1mk)​

Check the correct box to describe the periodic trends in electronegativity. electronegativity across a period: decreases. increases. electronegativity down a group: decreases. increases.

Will give brainliest it is a lab from k12 here is the linkfor each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. type your answer here. (score for question 3: of 5 points) were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. type your answer here. (score for question 4: of 5 points) make a general statement about the reactivity of the metals in this experiment. type your answer here.

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?