Question

1. an aluminum ion (al³⁺) contains: mark only one oval. 13 protons, 13 electrons, 14 neutrons 13 protons, 10 electrons, 14 neutrons 13 protons, 10 neutrons, 14 neutrons 10 protons, 13 electrons, 27 neutrons 13 protons, 10 electrons, 27 neutrons 26. which of the following describes isotopes? mark only one oval. atoms with different numbers of protons atoms with the same number of protons but different numbers of neutrons atoms with different numbers of electrons atoms with different atomic numbers 27. when uranium breaks apart into smaller nuclei, the process is called: mark only one oval. fusion fission ionization radioactivity 28. which best explains why sodium reacts explosively with water while neon does not? mark only one oval. sodium is a metal, neon is a gas sodium has one valence electron it can easily lose, neons valence shell is full sodium is lighter than neon neon has more protons

Explanation:

Step1: Recall aluminum's atomic number

The atomic number of aluminum (Al) is 13, which means it has 13 protons.

Step2: Analyze the aluminum ion ($Al^{3 +}$)

A $Al^{3+}$ ion has lost 3 electrons. So the number of electrons is $13 - 3=10$.

Step3: Determine the number of neutrons

The most common isotope of aluminum has a mass - number of 27. Mass number = number of protons+number of neutrons. So the number of neutrons is $27 - 13 = 14$.

Step4: Recall nuclear fission

When uranium breaks apart into smaller nuclei, the process is called fission.

Step5: Analyze sodium and neon reactivity

Sodium is a metal and has one valence electron which it can easily lose in reactions. Neon is a noble gas with a full valence shell and is chemically inert. So sodium reacts explosively with water while neon does not because sodium has one valence electron it can easily lose.

Step6: Recall the definition of isotopes

Isotopes are atoms of the same element with the same number of protons but different numbers of neutrons.

Answer:

1. 13 protons, 10 electrons, 14 neutrons
2. Fission
3. Sodium has one valence electron it can easily lose
4. Atoms with the same number of protons but different numbers of neutrons