Experiment 7, PreLab

which halide in orange?

Bromide

which halide is clear?

Chloride

which halide is purple?

Iodide

period

a horizontal row of elements in the periodic table

flame test

a means of identifying an element by observing the characteristic color it emits when placed in a hot flame

halide

a negatively charged Group VIIA/17 atom; e.g., bromide, chloride, iodide

group

a vertical column of elements in the periodic table having similar properties

alkali metals

any Group IA/1 element, excluding hydrogen

alkaline earth metals

any Group IIA/2 element

which element burns yellow-green?

barium

which element burns brick-red?

calcium

which element burns scarlet-red?

lithium

which element burns violet?

potassium

ppt

precipitate

immiscible

refers to a liquid that does NOT dissolve in another and separates into two layers

which element burns a yellow?

sodium

which element burns bright red?

strontium

periodic law

the properties of the elements recur in a repeating pattern when arranged according to increasing atomic number

where is the end of the wire placed when performing a flame test?

the tip of the burner flame

is a halide observed in the upper or lower layer?

upper

are water and hexane immiscible?

yes