Question

Установить последовательность возростания возобновляющих свойств атомов элементов:MgBeBaSrУстановить последовательность уменьшения активности атомов элементов-галогенов AtBrFI

Answer 1

Активность галогенов уменьшается в ряду F ---- Br  ----  I  ----  At

1-е не совсем понятно, что значит возобновляющих свойств....Если возрастание металлических свойств  имеется в виду, то:  Be -----   Mg ----   Sr ----   Ba

Answer 2

Sequence of Increasing Renewing Properties of Atoms:

The sequence of increasing renewing properties of atoms can be determined by considering their atomic structure and position in the periodic table.

Magnesium (Mg) has a higher renewing property compared to Beryllium (Be), Barium (Ba), and Strontium (Sr). This is because as you move down a group in the periodic table, the renewing properties generally increase due to the increase in the number of electron shells.

According to the periodic table trends, the sequence of increasing renewing properties of the given elements is: Be < Mg < Sr < Ba.

Sequence of Decreasing Activity of Halogen Atoms:

The activity of halogen atoms decreases as we move down the group in the periodic table.

Astatine (At) has the highest activity, followed by Bromine (Br), and then Iodine (I). This is due to the decrease in electronegativity and reactivity as we move down the group.

Therefore, the sequence of decreasing activity of the given halogen elements is: At > Br > I.