Answer:
Extraction of aluminium
Aluminium ore is called bauxite . The bauxite is purified to produce aluminium oxide, a white powder from which aluminium can be extracted. The extraction is done by electrolysis. The ions in the aluminium oxide must be free to move so that electricity can pass through it.
Answer:
Electromagnetic Radiation
Activity: TV or Radio
Type: Infrared Waves
Description of use:A television (also known as a TV) is a machine with a screen. Televisions receive broadcasting signals and turn them into pictures and sound. The word "television" comes from the words tele (Greek for far away) and vision (sight). ... Computers and mobile devices also can be used for watching television programs.
Answer:
<h3>a).</h3>
lithium fluoride => LiF
lithium chloride =>LiCl
lithium bromide => LiBr
lithium iodide => Lil
lithium oxide =>Li₂O
lithium sulfide => Li₂
<h3>b). </h3>
sodium fluoride => NaF
sodium chloride => NaCl
sodium bromide => NaBr
sodium iodide => Nal
sodium oxide => Na₂O
sodium sulfide => Na₂S
<h3>c). </h3>
potassium fluoride => KF
potassium chloride => KCl
potassium bromide => KBr
potassium iodide => KI
potassium oxide => K₂O
potassium sulfide => K₂S
<h3>d). </h3>
ammonium fluoride =>NH₄F
ammonium chloride => NH₄Cl
ammonium bromide => NH₄Br
ammonium iodide => NH₄I
ammonium sulfide => (NH₄)₂S