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Elements and their properties
atoms and their masses
Atoms are indivivsible
Atoms and their electrons/and how they interact with each other
atoms mass/chemical behavior
100
Any material that cannot be broken down to simpler materials
What is an element?
100
smallest representative part of an element.
What is an atom?
100
negatively charged subatomic particle of an atom
define an electron
100
the arrangement of the electron of an atom in its different energy sub-levels
Define electron configuration
100
all of which are gasses that are not chemically reactive.
What is a noble gas?
200
Property of matter that can be measured without causing chemical change or composition of the material. Density is a physical property of a substance.
What is a physical property?
200
material that can be detached chemically into two or more kinds of atoms.
What is a compound?
200
positively charged subatomic particle in the nucleus of an atom.
What is a proton?
200
electron of an atom that absorbed enough energy to rises to the next energy level.
what does excited state mean?
200
the electrons in the outermost energy levels of an atoms.
What are valence electrons?
300
Chemical Property
when you observe that the element has a reaction which hydrochloride, is clearly what property?
300
matter was made up of tiny particles that could not be broken down further.
What is matter made up of?
300
helium ions that are positively charged.
What is an alpha particle?
300
lowest energy sub-level of an atom can occupy.
what does ground state mean?
300
protons and neutrons
what is the nucleus made up of?
400
Physical Property
When you are measuring a property of a substance and it does not change the chemical identity of the substances, what are you measuring?
400
Aristotle believed that if atoms do exist, there would be empty in empty space between them.
Which ancient greek philosopher did not believe in the existence of atoms? what was his believe?
400
very small dense region in the center of the atom contains all the positive charge and most of the mass.
What is the nucleus?
400
metals have luster. they exhibit conductivity. they conduct electricity and heat. they are malleable and ductile and they are often relatively reactive. many metals for a compound on their surface that result from reaction with air.
how can you classify a material as a metal or a nonmetal?
400
atoms of the same element that have different masses due to a different number of neutrons.
What is an isotope?
500
oxides
when elements combine with oxygen what do they form
500
atoms. the greek word atoms. meaning invisible.
What are tiny particles that could be broken down further? what does this name stand for and its definition?
500
they are electrical.
What are the major forces involved in chemistry?
500
electron structure of each solution. the key to the colors is matter.
what are the colors of result of? what is the key to the colors?
500
its rarity and lack of chemical activity
why did argon escape notice from the periodic table?