The Periodic Table

<p>Bohr and Rutherford proposed a theoretical model for the atom in which electrons are arranged in layers or shells around the nucleus. Each shell can hold a certain number of electrons, with the first shell (K shell) holding a maximum of two electrons, the second shell (L shell) holding a maximum of eight electrons, and the third shell (M shell) holding up to eighteen electrons, but being stable at eight.</p> Signup and view all the answers

<p>Their atoms have one empty space in their outer shell</p> Signup and view all the answers

<p>Group VIII (Group 0)</p> Signup and view all the answers

<p>The mass of an atom depends on the number of protons and neutrons it has, which can be calculated using the mass number formula: mass number = number of protons + number of neutrons.</p> Signup and view all the answers

<p>The first shell (K shell) can hold a maximum of two electrons, the second shell (L shell) can hold a maximum of eight electrons, and the third shell (M shell) can hold up to eighteen electrons, but is stable at eight.</p> Signup and view all the answers

<p>The electrons build up from the first shell, filling each one until all the electrons are in place, resulting in all the electrons being as close to the nucleus as they can be.</p> Signup and view all the answers

<p>Protons and neutrons have approximately the same mass, while electrons have a mass so small it can be ignored.</p> Signup and view all the answers