use your periodic table to complete this atomic model of Beryllium (be)

Question

2 electrons
4 protons
3 neutrons
Look at how many protons, electrons and neutrons are already in the model. What needs to be added to complete this model of a Beryllium (Be) atom? Choose all that apply.

(2 points)
Responses

1 more proton
1 more proton

2 more neutrons
2 more neutrons

3 more electrons
3 more electrons

2 more electrons
2 more electrons

1 more neutron

Answer 1

To complete the atomic model of Beryllium (Be), the atom needs the following:

• Beryllium has 4 protons, which means the model already has the correct number of protons. Therefore, you do not need to add any protons.

• Beryllium has 4 neutrons (which is typically the case for the most common isotope, Beryllium-9). Since you currently have 3 neutrons, you will need to add 1 more neutron.

• Beryllium has 2 electrons, and since the model currently has 2 electrons, you do not need to add any more electrons.

So, the correct response is:

• 1 more neutron.

The other options do not need to be added (no additional protons or electrons are needed).