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13-12-2022
Chemistry

contestada

please!!! help with the test!!!!!
Write an answer with no huge text (As a chemical example).
Test:

1. the charge of the atomic nucleus of the element to + 29, that it is behind the element in nature and in which group of periodic system is located, write its chemical sign.

2. what substances are called simple? give 3 examples?

3. In what substances "oxygen is used in the treatment of pulmonary indulgences" is it referred to as a chemical element or substances?

4. List all known types of chemical reactions. give an example of 1 of them. arrange the indices and the coefficient.

5. Calculate the molecular weight and trailed content of silver, sulfation and silver. Ag2SO4

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