A table of the chemical elements arranged in order of atomic number.
What is periodic table?
100
How many elements are in the periodic table?
What is 118?
100
The scientist who came up with the periodic table is...
What is Dmitri Mendeleev?
100
The number of protons in the nucleus of an atom, it determines the chemical properties of an element and its place in the periodic table.
What is atomic number?
200
Each of more than 100 substances that cannot be chemically broken down into simpler substances. Each of these substances is distinguished by it's atomic number, the number of protons in the nuclei of its atoms.
What is element?
200
Element in period one, row one.
What is Hydrogen?
200
Something you won't find in the periodic table is...
What is the atomic radius of an atom.
200
A column, in which it goes from top to bottom in the periodic table.
What is group?
300
The positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
What is nucleus?
300
Number of groups in the periodic table
What is 18?
300
What causes the nucleus to change?
What is Radioactive decay?
300
An element that is not a metal.
What is nonmetal?
400
An element whose properties are intermediate between those of metals and solid nonmetals. They are electrical semiconductors.
What is metalloids?
400
Number of periods in the periodic table.
What is 7?
400
What is the organization of the periodic table is based on...
What is properties of elements?
400
A row, in which it goes from left to right in the periodic table.
What is period?
500
About the same mass as a proton but without an electric charge.
What is neutron?
500
The element abbreviated as He.
What is Helium?
500
This determines an elements properties.
What is the structure of atoms?
500
A charge of negative electricity in which is found in all atoms.