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Vocabulary
Philosophical to scientific
Parts of an atom
Math
Using the periodic table
100
the small region located at the center of an atom
What is the nucleus
100
Their opinions were not based on experimental evidence
Who are Aristotle and Democritus?
100
the positively charged particle
What is a proton
100
6.022 x 10^23 atoms
What is Avogadro's number
100
the number of protons of each atom of the element
What is the atomic number
200
atoms of the same element that have different masses
What are isotopes
200
This theory provides an explanation for the law of conservation of mass during a chemical reaction
What is Dalton's Atomic Theory
200
negatively charged particles
What are electrons
200
amount of atoms of Al are in 2.75 mol Al
What is 1.656 x 10^24 atoms Al
200
the mass of an element
What is the atomic mass
300
the total number of protons and neutrons that make up the nucleus in an isotope
What is the mass number
300
Did not believe there was such things called atoms
Who is Aristotle?
300
the neutral particles
What are neutrons
300
the mass in gram of 2.25 mol Fe
What is 126 g Fe ?
300
the total number of protons and neutrons that make up its nucleus
What is the mass number
400
A general term for the specific isotope of an element?
What is a nuclide
400
Chemists agreed that elements cannot be broken down further by ordinary chemical means
When was the late 1700's
400
holds protons and neutrons together
What are nuclear forces
400
3.01 x 10^23 atoms of Cl in grams
What is 17.7 g Cl
400
exactly 1/12 the mass of a carbon-12 atom
What is one unified atomic mass unit
500
the mass of one mole of a substance
What is the molar mass
500
All compounds have a fixed composition that does not vary from sample to sample
What is the law of definite proportions
500
where the electrons are located
What is the electron field?
500
amount of atoms in 4.00 g S
What is 7.513 x 10^22 S atoms
500
the weighted average of the atomic masses of the isotopes of an element found in nature
What is the average atomic mass