Chemistry Chapter on Atomic Structure

The atomic number is defined by the number of protons in the nucleus of an atom.

Protons are positively charged particles, while neutrons are uncharged.

An isotope is an atom of the same element with a different number of neutrons, resulting in a different mass number.

<p>The mass of an electron is approximately 0 u, significantly smaller than the mass of protons and neutrons, which are approximately 1 u.</p> Signup and view all the answers

<p>The mass number is calculated by adding the total number of protons and neutrons in the nucleus.</p> Signup and view all the answers

<p>He rearranged the periodic table by atomic number instead of atomic mass.</p> Signup and view all the answers

<p>Isotopes are atoms with the same number of protons but different numbers of neutrons. An example is Carbon-12 and Carbon-14.</p> Signup and view all the answers

<p>Each element includes its atomic number, chemical symbol, element name, and atomic mass.</p> Signup and view all the answers

<p>Metals are shiny, good conductors of heat and electricity, and most are solid at room temperature.</p> Signup and view all the answers

<p>The average atomic mass is the weighted average of all isotopes of an element.</p> Signup and view all the answers