Examine the three listed elements of Group 13.

boron (B), aluminum (Al), gallium (Ga)

If boron has two energy levels, then how many energy levels do the other two elements have?

Aluminum has three energy levels, and gallium has four energy levels.
Aluminum has four energy levels, and gallium has three energy levels.
Aluminum and gallium both have two energy levels.
Aluminum has one energy level, and gallium does not have any energy levels

please help

Aluminum has three energy levels, and gallium has four energy levels.

bro j say the answer...not that hard

To determine the number of energy levels for aluminum (Al) and gallium (Ga) based on the given information, you need to understand the electron configuration of these elements.

The electron configuration describes how electrons are distributed among the energy levels or electron shells of an atom.

Boron (B) has an atomic number of 5, which means it has 5 electrons. The electron configuration for boron is 1s^2 2s^2 2p^1. This means that boron has two energy levels: the first energy level (1s^2) is completely filled with 2 electrons, and the second energy level (2s^2 2p^1) has 3 electrons.

Aluminum (Al) has an atomic number of 13, so it has 13 electrons. The electron configuration for aluminum is 1s^2 2s^2 2p^6 3s^2 3p^1. This indicates that aluminum has three energy levels: the first energy level (1s^2) is completely filled with 2 electrons, the second energy level (2s^2 2p^6) is also completely filled with 8 electrons, and the third energy level (3s^2 3p^1) has 3 electrons.

Gallium (Ga) has an atomic number of 31, meaning it has 31 electrons. The electron configuration for gallium is 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^1. This implies that gallium has four energy levels: the first energy level (1s^2) contains 2 electrons, the second energy level (2s^2 2p^6) contains 8 electrons, the third energy level (3s^2 3p^6) contains 18 electrons, and the fourth energy level (4s^2 3d^10 4p^1) has 3 electrons.

Therefore, the correct answer is: Aluminum has three energy levels, and gallium has four energy levels.

I can help but you need to tell me what you don't understand about this problem. Note that H is in row 1 and has 1 energy level.

Then Li is in row two and has 2 energy levels.
Then Na is in row 3 and has 3 energy levels. Do you see a trend here? What rows are used for B, Al, Ga?