Groups of the Table
What are the elements in group 2 known as?
What is alkaline earth
The element symbol of potassium.
What is K?
An element that has 1 valence electron.
Who is Hydrogen, Lithium, Sodium, Potassium, Rubidium, Cesium, Francium?
A substance made entirely of a single type of atom.
What is an element?
The columns in the periodic table are called ______.
What are groups?
What are the elements in group 18 called?
What are noble gases?
The element symbol of iron.
What is Fe?
An element that has 3 valence electrons.
Who is Boron, Aluminum, Gallium, Thallium, Indium, Nihonium?
The smallest unit of an element.
What is an atom?
The rows in the periodic table are called ______.
What are periods?
Why are the group 18 elements unreactive?
They have a full outer shell; 8 valence electrons
The atomic number of an element shows ___.
What is the number of protons or electrons?
An element that has 8 valence electrons.
Who is Neon, Argon, Krypton, Xenon, Radon, Oganesson?
A neutrally charged particle either found free or in a nucleus.
What is a neutron?
Valence electrons are _________.
What are the electrons in an atom's outer shell.
What are the elements in group 17 called?
What are halogen gases?
The mass number of an element shows __.
What is protons and neutrons; weight of an element?
An element that has 6 valence electrons.
Who is Oxygen, Sulfur, Selenium, Tellurium, Polonium, Livermorium?
A positively charged particle either found free or in a nucleus.
What is a proton?
The creator of the Periodic Table.
Who is Dmitri Mendeleev?
The elements that are disconnected from the rest of the table
What are the transition elements; lanthanides and actinides
An element that has 2 valence electrons.
Who is Helium, Beryllium, Magnesium, Calcium, Titanium, Vanadium, Iron, Cobalt, Nickel, Copper, Zinc, Gold, Silver...?
A substance containing two or more elements bonded together.
What is a compound?
There are _____ elements in the periodic table.
What is 118?