Chemistry Periodic Table Quiz

They use properties of elements, which is called periodicity.

Dmitri Mendeleev

Mendeleev arranged the elements by increasing atomic mass.

<p>The gaps in Mendeleev's periodic table represent elements that had not yet been discovered.</p> Signup and view all the answers

<p>Henry Moseley by placing the elements according to increasing atomic number.</p> Signup and view all the answers

<p>When elements are arranged in order of increasing atomic number, there is periodic repetition of their physical and chemical properties.</p> Signup and view all the answers

<ol> <li>Metals - great conductors of heat and electric current, tend to be ductile, malleable, and shiny (e.g., Iron). 2. Nonmetals - poor conductors of heat and electric current, have properties opposite those of metals, most are gases (e.g., Oxygen). 3. Metalloids - have properties similar to those of both metals and nonmetals (e.g., Silicon).</li> </ol> Signup and view all the answers

<p>Alkali metals are soft, highly reactive metals that produce alkaline solutions (e.g., Sodium).</p> Signup and view all the answers

<p>Alkali Earth Metals are harder, denser, stronger, and have higher melting points than alkali metals. They are less reactive than alkali metals (e.g., Calcium).</p> Signup and view all the answers

<p>Halogens are elements that combine easily with metals to form salts. They are the most reactive nonmetals (e.g., Chlorine).</p> Signup and view all the answers

<p>Noble gases, representative elements, transition metals, and inner transition metals.</p> Signup and view all the answers

<p>A noble gas is an element that rarely takes part in any reactions due to having full s and p orbitals in the highest principal energy levels (e.g., Helium).</p> Signup and view all the answers

<p>To be an inert gas, an element must rarely take part in reactions.</p> Signup and view all the answers

<p>Representative elements display a wide range of physical and chemical properties; some are metals, nonmetals, and metalloids (e.g., Bromine).</p> Signup and view all the answers

<p>Transition metals are elements in the highest occupied s sublevel and nearby d sublevel generally containing electrons.</p> Signup and view all the answers

<p>Inner transition metals are elements in the highest occupied s sublevel and nearby f sublevel generally containing electrons. Elements in either lanthanide or actinide series.</p> Signup and view all the answers

<p>Lanthanides are shiny metallic elements with atomic numbers 58-71. They fill 4f sublevels.</p> Signup and view all the answers

<p>Actinides are metallic elements with atomic numbers 90-103. They have unstable arrangements of protons and neutrons and all have radioactive forms.</p> Signup and view all the answers

<p>Ammonia</p> Signup and view all the answers

<p>The periodic table is broken down into blocks by electron configuration and the position of the elements: 1. S-block - groups 1A, 2A, and H; 2. P-block - groups 3A-8A; 3. D-block - groups 1B-8B; 4. F-block - lanthanides and actinides.</p> Signup and view all the answers

<p>Atomic radius is one half the distance between the nuclei of two atoms of the same element when atoms are joined. It is usually measured in picometers (10^-12 m).</p> Signup and view all the answers

<p>Increases from top to bottom, decreases from left to right.</p> Signup and view all the answers

<p>The reduction of the attractive force between a nucleus and an outer electron.</p> Signup and view all the answers

<p>An atom or a group of atoms that has either lost or gained one or more electrons.</p> Signup and view all the answers

<p>Positively charged ions formed when an atom loses one or more electrons.</p> Signup and view all the answers