Question

16 question (2 points)
an atom has an atomic symbol of ( ^{27}\text{al} ).

1st attempt

part 1 (0.5 point)
how many protons does the atom have?

part 2 (0.5 point)
how many neutrons does the atom have?

part 3 (0.5 point)
how many electrons does the atom have?

part 4 (0.5 point)
what is the mass number?

Explanation:

Part 1

Step1: Recall atomic number of Al

Aluminum (Al) has an atomic number (Z) of 13. Protons = atomic number.
<Protons = 13>

Step1: Identify mass number (A)

Mass number (A) of \( ^{27}\text{Al} \) is 27.

Step2: Neutrons = A - Z

Z (protons) = 13, so Neutrons = \( 27 - 13 = 14 \).
<Neutrons = 27 - 13 = 14>

Step1: Neutral atom, electrons = protons

In a neutral atom, number of electrons equals number of protons. Protons = 13, so electrons = 13.
<Electrons = 13>

Answer:

13

Part 2