What is malleability, ductility, thermal conductivity, electrical conductivity.
100
atomic nuclei of unstable isotopes release fast-moving particles and energy
What is radioactive decay
200
-all atoms composed of atoms that cannot be divided
-atoms of the same element are exactly alike and have the same mass
-an atom of one element cannot be changed into atom of a different element.
-every compound is composed of atoms of different elements in a specific ration.
What is Dalton's ATomic Theory
200
The number of prontons + neutrons
What is the atomic mass
200
the average mass of all the isotopes of an element
What is the atomic mass
200
Chemical properties
What is reactivity and corrosion
200
_______________ called this radioactivity
Who is Marie Curie
300
series of models that developed from experimental evidence and models revised.
What is atomic theory
300
true or false:
electrons balance protons charge-for-charge making an atom neutral.
What is true.
300
an arrangement of elements showing the repeating pattern of their properties.
What is the periodic table
300
never found uncombined in nature, lose one electron.
What are Alkali Metals
300
3 rays
What are Alpha, beta, gamma
400
Found that atoms contain negatively charged particles
Who is Thompson
400
Atoms of the same element that have different numbers of neutrons
What are isotopes
400
What information is provided about any one element by looking at its square in the periodic table?
What is its atomic number, chemical symbol, name, mass, which you can get the number of protons, neutrons, and electrons from.
400
Gray-white, hard, good conductors, losing two electrons
What are Alkaline Earth Metals,
400
Use of radioactive ___________ include tracing the steps of chemical reactions and industrial processses, and diagnosing and treating disease.
What is isotopes.
500
At the center of this atom is a tiny, massive nucleus containing protons and neutrons. Surrounding the nucleus is a cloudlike region of moving electrons.
What is the Modern Atomic Model
500
An isotope is identified by this.
What is its mass number.
500
describe how the periodic table is organized
by atomic number, by PROPERTIES, by mass, by reactivity.
500
groups 3-12
What is Transition Metals
500
radioactive isotopes that can be followed through the steps of a chemical reaction or an industrial process.