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8th Grade Unit 2.3: Atomic Structure and the Periodic Table

Horizontales
How likely an element is to undergo a chemical change.
Horizontal rows in the periodic table.
Elements whose properties tend to be opposite of metals. They are represented on the right side of the periodic table.
The time it takes one-half of the atoms in a particular sample to decay.
The average mass of all the element's isotopes.
The measure of how well a substance conducts electic currents.
The combination of protons and neutrons.
The total number of protons and neutrons in an atom's nucleus.
The identity of an atom which is determined by the number of protons in its nucleus.
On the periodic table, these are the elements in a column.
Verticales
A table that shows a periodic, or repeating, pattern of properties of the elements.
Elements that have properties of both metals and nonmetals.
A positively charged particle.
In the early 1900's Marie Curie named this process by which atoms produce energy and particles.
The measure of how well a substance conducts thermal energy.
Elements that conduct electric currents and heat well and have a shiny appearance.
An uncharged particle.
Atoms of the same element that have a different number of neutron.
Formed when an atom loses or gains one or more electrons.
Negatively charged particles that move around outside of the nucleus.