A TEACHING AID
    1.
    发明申请
    A TEACHING AID 审中-公开
    教学辅助

    公开(公告)号:WO02061710A8

    公开(公告)日:2004-03-25

    申请号:PCT/IE0200010

    申请日:2002-01-30

    CPC classification number: G09B23/24

    Abstract: A teaching aid comprising a plurality of discs, each with a front (2) and a rear (3) face, and one or more edges (4, 5, 6, 7). The front face (2) having a chemical symbol printed thereon and one or more lines (10) indicating the valency of the chemical entity printed thereon. The size of the disc (1) and the positions of the lines (10) on a disc is such that if necessary a disc may accommodate adjacent abutting discs (1). Certain discs (1) also indicate the charge of the chemical species thereon by the positions of the lines on the left or right hand side of the disc (1) for negative and positive charges respectively.

    Abstract translation: 一种教具,包括多个盘,每个盘具有前(2)和后(3)面,以及一个或多个边缘(4,5,6,7)。 其上印有化学符号的前面(2)和表示印刷在其上的化学实体的化合价的一条或多条线(10)。 盘(1)的尺寸和盘上的线(10)的位置是这样的,如果需要,盘可容纳相邻的邻接盘(1)。 某些盘(1)还分别指示盘(1)的左侧或右侧的线的位置上的化学物质的电荷,用于负电荷和正电荷。

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