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

choose 2

Answer 1

To complete the atomic model of a Beryllium (Be) atom, you need to ensure the atom has the correct number of protons, neutrons, and electrons.

Beryllium has:

• 4 protons
• 4 neutrons (typically in the most abundant isotope)
• 4 electrons

Given your starting points:

• 4 protons: This is correct for Beryllium.
• 2 electrons: This means you need 2 more electrons to reach 4.
• 3 neutrons: This means you need 1 more neutron to reach 4.

Based on the options you provided, you should choose:

1. 2 more electrons
2. 1 more neutron

So, to complete the atomic model of Beryllium, you would need to add 2 more electrons and 1 more neutron.