Тест на тему: Valence. Types of chemical reactions 1. Which element always has divalent atoms? 1) H 2) S 3) Ba 4
Тест на тему: "Valence. Types of chemical reactions"
1. Which element always has divalent atoms?
1) H
2) S
3) Ba
4) Fe
2. The valence of sodium is always equal to:
1) I
2) II
3) III
4) IV
3. Choose the incorrect statement. Valence is:
1) The property of atoms of a chemical element to combine with a certain number of atoms of other chemical elements.
2) The number indicating how many hydrogen atoms can be attached to the atom of a given element.
3) The number indicating how many oxygen atoms can be attached to the atom of a given element.
4) The number obtained by dividing the sum of valence units.
1. Which element always has divalent atoms?
1) H
2) S
3) Ba
4) Fe
2. The valence of sodium is always equal to:
1) I
2) II
3) III
4) IV
3. Choose the incorrect statement. Valence is:
1) The property of atoms of a chemical element to combine with a certain number of atoms of other chemical elements.
2) The number indicating how many hydrogen atoms can be attached to the atom of a given element.
3) The number indicating how many oxygen atoms can be attached to the atom of a given element.
4) The number obtained by dividing the sum of valence units.
Тигресса 17
number of electrons in the outermost shell of an atom by 8. Пожалуйста, ожидайте момента, пока я подготовлю и напишу ответ на ваш тест.