Ionisation Energy

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  1. 1.

    The correct order of IE1 is:

  2. 2.

    IE of boron is less than beryllium because:

  3. 3.

    Which element has the highest IE1?

  4. 4.

    IE decreases down a group because:

  5. 5.

    IE1 generally increases across a period because:

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