Question

cora wants to draw a model of an atom for her project for the sicence far. she wants to draw an atom that has two protons, four neutrons, and two electrons. which model is like cora's?

Answer 1

Answer:

Cora's model does not exist in the atomic table, but close to helium which has a neutron of 2 and an electron and proton of 2 as well.

Explanation:

The number of electrons in an atom is the same as the number of protons, so if the number of electrons is 2, the number of protons is 2.

The neutron of an atom is the result of the subtraction of the atomic number from the atomic mass of the atom. Cora's has an atomic number of two (number of electrons) and the atomic mass of four. Therefore the neutron should be two (helium) and not four.