Say in English " золото і срібло"
Oxygen and nitrogen widely .... in nature.
Chlorine is a greenish yellow gas which is not difficult to .... by its odor.
Match the noun to the verb " suspend"
Match the noun to the verb "establish "
Symbols in chemistry stand .... .
What is the atom?
Atoms can combine and form ....
Two atoms of hydrogen will form a ....... .
When does the water freeze?
Створюйте онлайн-тести
для контролю знань і залучення учнів
до активної роботи у класі та вдома