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Atoms/Periodic Table

Across
The dense center of an atom where protons and neutrons are located.
Vertical columns of elements that have similar chemical properties.
A particular place where something can be found.
A subatomic particle that has a positive charge.
Elements dull and poor conductors.
Particles that are smaller than an atom.
Abbreviation for the elements name.
It is the quantity of electricity found in a subatomic particle.
The total number of protons and neutrons in an atom's nucleus.
The mass unit used to measure subatomic particles.
Down
A subatomic particle that has a negative charge.
Horizontal rows of elements that dictate energy levels.
The number of protons distinguishes the atoms of one element from the atoms of another.
Area around the nucleus where electrons move very quickly.
Elements that have some properties of metals and nonmetals.
Anything that has mass and takes up space.
Subatomic particle that has a neutral charge.
Elements that are shiny and good conductors.
The smallest particle of an element maintaining the chemical identity of that element.