a. Look at Figure 11.3. i. What is the general trend in the melting points going down

Question:

a. Look at Figure 11.3.

i. What is the general trend in the melting points going down Group 2?

ii. Which element breaks the trend?

b. Explain why the atoms in Group 2, as in any other group, get larger with increasing atomic number.

c. Would you expect the 2+ ions of Group 2 elements to be larger or smaller than their atoms? Explain your answer.

d. Radium (Ra) is a radioactive element found below barium at the bottom of Group 2. Predict:

i. Its melting point

ii. Its density

iii. Its metallic radius.

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Cambridge International AS And A Level Chemistry Coursebook

ISBN: 9781316637739

2nd Edition

Authors: Lawrie Ryan, Roger Norris

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Question Posted: Sep 20, 2021 01:39 AM

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a. Look at Figure 11.3. i. What is the general trend in the melting points going down

Question:

First ionisation Second ionisation Group 2 element energy / kJ mol-1 energy / kJ mol-1 beryllium (Be) magnesium (Mg) 900 1760 736 1450 calcium (Ca) 590 1150 strontium (Sr) barium (Ba) 548 1060 502 966 Table 11.3 The first and second ionisation energies of the Group 2 elements.

Step by Step Answer:

a Strontium Sr breaks the trend because it has a higher second ionisation energy than calc...View the full answer

Cambridge International AS And A Level Chemistry Coursebook

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