31 protons 31 electrons and 39 nutrons
Answer: Fundamental, Key, vital, crucial
Explanation:
Answer:
answer is b
Explanation:
All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic than its predecessor
Answer:
b
Explanation:
[H3O+] = 10-pH = 10-3.4 ≅ 3.981 x 10^-4 moles/liter
I would say because the respiratory system brings in the oxygen for the body and the circulatory system moves it throughout the body with the blood