How many protons are in the nucleus of an aluminum atom

13 protons

Explanation:

Aluminum has an atomic number of 13, therefore it has 13 protons.

the correct answer is: d. the saltine and pretzel are made of flour, yeast, and baking soda, and salt. the pecan contains no flour but it does contain fats. the pecan is a nut that can be consumed as a healthy snack. first of all, pecans are a source of fat (monounsaturated fat), but they provide less fat than some other nuts. pecans are a rich source of dietary fiber, manganese magnesium, phosphorus, thiamin, vitamin e…

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.