Предмет: Химия, автор: bbig90899

ПОМОГИТЕ ПОЖАЛУЙСТА ХАРАКТЕРИСТИКА ЭЛЕМЕНТА БОР И КАЛИЙ
1.Анализ положения элемента в переодической системе(порядковый номер,период,ряд,группа,подгруппа).

2.Заряд ядра атома,количество частиц,относительная атомная масса.

3.Электронная структура атомов элемента.Валентные электроны.

4.Формы и свойства высших кислородных и водороднных соединений.

5.Определение характера элемента.

6.Сравнение свойств элемента и его соединений с окружающими его элементами.

7.Общая сравнительная характеристика элемента.

СРОЧНО!!!

Ответы

Автор ответа: yuoyu75
1

Ответ:

Бор B порядковый номер 5, период 2, элемент 3 группы  главной подгруппы., заряд ядра +14, Ar(B)= 11,  5 протонов, 5 электронов, 6 нейтронов

1s22s22p1

Валентные электроны: 2s22p1 всего 3

Высший оксид B2O3 - кислотный

Н3ВО3 - ортоборная кислота (борная)

BH3

неметалл

обладает большими неметаллическими свойствами, чем бериллий и  алюминий, и меньшими неметаллическими свойствами чем углерод

Калий -  порядковый номер 19, период 4, элемент 1 группы  главной подгруппы, заряд ядра +19, Ar(B)= 39,  19 протонов, 19 электронов, 20 нейтронов

1s22s22p63s23p64s1

Валентные электроны: 4s1 всего 1

Высший оксид K2O - основный

KOH - гидроксид калия (едкое кали)

КH

металл

обладает большими металлическими свойствами, чем кальций и натрий, и меньшими металлическими свойствами чем рубидий

Объяснение:

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