磁石係由咩金屬組成?
2007-01-15 13:52:08 · 2 個解答 · 發問者 Demonlogist 5 in 科學 ➔ 其他：科學
I presume that you are referring to permanent magnets.
Only ferromagnetic substances can be made into permanent magnets. There are only three ferromagnetic elements. They are iron, nickel and cobalt.
2007-01-15 16:07:09 · answer #1 · answered by 天同 7 · 0⤊ 0⤋
任何金屬只要跟天然磁石碰在一起,也能變磁石
2007-01-15 13:56:16 · answer #2 · answered by ? 2 · 0⤊ 0⤋