State the trend in atomic radius for atoms of the elements down Group 2 from Mg to Ba. Give a reason for this trend.

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The OCR A Chemistry specification splits the content into 6 modules:

(1) Development of practical skills in chemistry (2) foundations in chemistry (3) Periodic table and energy (4) Core organic chemistry (5) Physical chemistry and transition metals (6) Organic chemistry and analysis.

1. State the trend in atomic radius for atoms of the elements down Group 2 from Mg to Ba. Give a reason for this trend.

The more protons in the nucleus, the more positively - charged the nucleus therefore a greater attraction for the electrons.
In atoms, the total number of electrons is the same as the total number of protons.
Increases More shells
'Iodide is a larger ion than bromide so less attraction to the Na+ ion. (1) So, Br'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>BrBr is more reactive than I'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>II with Na'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>NaNa, because Br'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>BrBr is higher up the group (the atomic number of Br'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>BrBr is 35'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>3535, while the atomic number of I'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>II is 53'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>5353). Since Br'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>BrBr is more readily reactive with Na'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>NaNa than I'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>II, the bond between Na'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>NaNa and Br'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>BrBr is stronger than the bond between Na'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>NaNa and I'' role=''presentation'' style=''margin: 0px; padding: 0px; border: 0px; font-variant-numeric: inherit; font-variant-east-asian: inherit; font-stretch: inherit; line-height: normal; font-family: Georgia, ''Times New Roman'', Times, serif; font-size: 15px; vertical-align: baseline; display: inline; overflow-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; color: rgb(36, 39, 41); position: relative;''>II.'

State the trend in atomic radius for atoms of the elements down Group 2 from Mg to Ba. Give a reason for this trend.

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State the trend in atomic radius for atoms of the elements down Group 2 from Mg to Ba. Give a reason for this trend.

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All trademarks, logos and brand names are the property of their respective owners. All company, product and service names used in this website are for identification purposes only. Use of these names, trademarks and brands does not imply endorsement.

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