harmonytaylor13
08.07.2019 •
Chemistry
An example of a qualitative observation would be a. a product of a reaction was solid b. an object makes a crackle noise c. an object feels smooth d. all of these
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Ответ:
option D : all of these refer to qualitative observations...
Ответ:
Ответ:
Sodium (Na)
Explanation:
The number of protons an element has is the same as its atomic number (number at the top of each element box) Cl is element numer 17, so it has 17 protons. 17-6 is equal to 11 protons. Sodium's atomic number is 11.