Given the atomic number, how would you know the number of electrons?

The atomic number represents the number of protons and the number of electrons. For example, if an element has an atomic number of 5, you can conclude it has 5 protons and 5 electrons.

Explanation:

See the answer above. Hope this helped! :)

the answer is d.) homologous; have mammary glands

the answer is lactic acid from anaerobic respiration. the acid in lactic acid is what creates sore and burning muscles. if you think about how acid burns that will give you a clue for questions like this.