Презентация "Структура Периодической системы химических элементов Д.И. Менделеева" на английском языке

Periodic Law – периодический закон
noble gas – инертный газ
transition metal – переходные элементы
nuclear charge – ядерный заряд
arrangement – расположение
in order of increasing atomic weight – в порядке возрастания
атомного веса
inert - инертный
to predict - предсказывать
existence - существование
confidence - уверенность
prediction - предсказание
missing – отсутствующий
main – главный
isotope – изотоп
rare gases – редкие газы
electron configuration – электронная конфигурация

MODERN PERIODIC TABLE is very important tool for chemists and scientists.
It is easy to predict the properties of elements by using periodic table.
In PERIODIC TABLE all elements are arranged from left to right and top to bottom in order of increasing atomic number

Atomic number is the order number of elements which is indicated by the number of protons of element.

Atomic number = proton number

Nowadays, there are 118 chemical elements. 94 of them are occurred naturally, where the remaining 24 elements are synthetic elements

Simple periodic table contains symbol, atomic number and relative atomic weight of chemical elements

Simple periodic table contains symbol, atomic number and relative atomic weight of chemical elements

Horizontal rows are called periods

There are seven periods

There are three short (1-3), two medium (4-5) and two long periods (6-7)