Answer:
See detailed explanation.
Explanation:
Hello.
In this case, since the electron configuration of potassium whose atomic number is 19 turns out:
We can see that the last level is 4 which has one electron, meaning that potassium has one valence electron. Moreover, since bromine's atomic number is 35, its electron configuration is:
We can see that the last level is also 4 and it has 2+5 = 7 valence electrons. In such a way, we infer that the valence electrons are computed by the electrons at the outer or last energy level of an element.
Regards.
Answer:
2Mg(s) + O₂(g) → 2MgO(s)
Explanation:
2Ca(s) + Cl₂(g) → CaCl₂(s) (incorrect)
Ca(s) + Cl₂(g) → CaCl₂(s) (correct)
Li(s) + Cl₂(g) → 2LiCl(s) (incorrect)
2Li(s) + Cl₂(g) → 2LiCl(s) (correct)
2C(s) + O₂(g) → CO₂(g) (incorrect)
C(s) + O₂(g) → CO₂(g) (correct)
Answer:
13
Explanation:
is the atomic number of AI
Answer:
neutrons are found in the nucleus of an atom.
Explanation: