Just Balanced
The sum of the number of protons and neutrons in an atom.
Mass Number
The particles that differ in number between two isotopes of the same element.
Neutron
An atom that has gained or lost one or more electrons, resulting in a charge.
Ion
A one or two letter abbreviation for an element, such as "H" for hydrogen.
Element symbol
This element is atomic number 45.
The region of the atom containing protons and neutrons.
Nucleus
An atom of carbon with a mass number of 12 has this many neutrons.
6
Positive
The total number of protons can be found by looking at this number in the element square.
Atomic number
This element has 81 protons.
Thallium
Protons
An atom of magnesium with 13 neutrons has a mass number of this.
25
Non-metals gain electrons, resulting in this net charge.
Negative
The number in the top right corner of the element square gives us this information.
Ion charge
Zirconium fits into this category of elements.
Metal
The element with an atomic number of 17.
Chlorine
An atom of phosphorous with a mass number of 31 has this many neutrons.
16
This is the element symbol for a sulfur ion.
S2-
This type of element is found in the far right column of the periodic table.
Noble gas
There are this many noble gases.
6
The term used to describe two elements, such as neon (Ne) and argon (Ar), that are in the same column on the periodic table.
Group
An atom of potassium-40 has this many neutrons.
21
This is the element symbol for a ytrium ion.
Y3+
Metals can be described as being found in this location of the periodic table.
Left and center
Tellurium fits into this category of elements.
Non-metal