Chapter 4:1 defining the atom Flashcards
Who was first to suggest existence of Atoms?
Democritus
Who reasoned that Atoms were indivisible and indestructible?
Democritus
Was Democritus’s atomic philosophy proved by scientific method?
No
Who made a discovery of Atoms in1766?
John dalton
Who said all elements are composed of tiny indivisible particles called atoms?
John Dalton
True or false? John Dalton said chemical reactions occur when Atoms are not separated from each other join or rearranged in a different combination Atoms of one element however are changed into Atoms of another element as a result of a chemical reaction?
false
True or false? Atoms of the same element are identical. the atoms of one element are different from those ofr any other element.
True
Based on Dalton’s atomic theory true or false? Adams of different elements can physically mix together or can chemically combine to form simple whole number ratios to form compounds.
True
Particles are made smaller, are they still made out of the same element?
Yes
What falls within the range of 5×10 to the -11 power to 2×10 to the -10 power?
The raddi of most atoms
What is one tool atoms are observable by?
Scanning electron microscope
What is a device Made from individual atoms?
Nanocar
Another word for the atomic scale?
Nanoscale
What is The smallest particle of an element that retains its identity in a chemical reaction?
Atom
Who said matter is composed of empty space through which atoms move?
Democritus
Who said different kinds of atoms have different shapes and sizes
Democritus
Who used experimental data? Dalton or Democritus?
Dalton
What are the 3 subatomic particles?
Electrons- e-
Protons- p+
Neutrons- n•
