Crossword Puzzle Element obtained from cassiterite

Clue: Element obtained from cassiterite

Spreadsheet elements (e.g. CELLS with 5 letters)
Mythological Theban with a chemical element named after her (NIOBE with 5 letters)
Euclid's "Elements," e.g. (TREATISE with 8 letters)
Chestnut named for an element (BROMIDE with 7 letters)
Element in uranium series (RADIUMA with 7 letters)
Orchard element (TREE with 4 letters)
Element with the symbol B (BORON with 5 letters)
Elementary facts (ABCS with 4 letters)
Element in some lamps (HALOGEN with 7 letters)
Elementary chord (TRIAD with 5 letters)