Name two important Greek philosophers/scientists who contributed to the earliest ideas on
atoms.️️Democritus and Aristotle
The concept of atoms reached its earliest modern form in 1808 when who wrote the book A New
System of Chemical Philosophy?️️John Dalton
An element is a substance ma...
An Introduction to Honors Chemistry with comprehensive
Questions and Answers
Name two important Greek philosophers/scientists who contributed to the earliest ideas on
atoms.✔️✔️Democritus and Aristotle
The concept of atoms reached its earliest modern form in 1808 when who wrote the book A New
System of Chemical Philosophy?✔️✔️John Dalton
An element is a substance made up of a unique type of what?✔️✔️Atom
Atoms of elements combine to form what?✔️✔️Chemical Compounds
Protons, neutrons, and electrons are subatomic particles. Name the charge and location of
each.✔️✔️Proton- + charge, nucleus
Electron- - charge, energy shells
Neutron- No charge (neutral), nucleus
Write the weight, in atomic mass units, of a proton in scientific notation.✔️✔️(1.67 * 10^-24)
grams (1 atomic mass unit)
Write the weight, in atomic mass units, of a neutron in scientific notation.✔️✔️(1.67 * 10^-24)
grams (1 atomic mass unit)
Write the weight, in atomic mass units, of an electron in scientific notation.✔️✔️(9.11 * 10^-28)
grams (0 atomic mass units)
How many electrons would it take to equal the mass of one proton?✔️✔️1,830 electrons
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