periodic table Crossword

A chart of all chemical elements currently known, organized by their properties.
the smallest unit of an element that maintains the properties of that element
physical characteristics of any given object
is any of a material's properties that becomes evident during, or after, a chemical reaction
is a term which refers to elements in the same group on the periodic table. This atoms often have similar properties such as reactivity
The nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding cloud of electrons
with a negative elementary electric charge
with a positive electric charge equal
with no net electric charge and a mass slightly larger than that of a proton.
the central and most important part of an object
a thing that is composed of two or more separate elements
a part or aspect of something abstract, especially one that is essential or characteristic
a solid material that is typically hard, shiny, malleable, fusible, and ductile
an element or substance that is not a metal.
whose properties are intermediate between those of metals and solid nonmetals
a unit used in expressing the molecular weight of proteins, equivalent to atomic mass unit.
are streams of electrons observed in vacuum tubes.
It is used to describe where electrons are when they go around the nucleus of an atom