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6grade chapter 11-1

QuestionAnswer
Number of protons in the nucleus of an atom. Atomic Number
Atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons. Isotope
Sum of numbers of protons and neutrons in the nucleus of an atom. Mass Number
The mass of an atom expressed in atomic mass units. Atomic Mass
Greek philosopher who believed atoms could be cut into small pieces. Aristotle
Greek philosopher who believed atoms were single material and could be cut into small pieces. Democritus
English scientist who believed atoms were small particles that could not be cut, divided , or destroyed . Dalton
Plum Pudding Model. He believed electrons moved through the atoms.Looked like a ball with push pins in it. Thomson
Discovered the nucleus was positively charged part of an atom and found in the center of an atom. Rutherford
Discovered energy level. Bohr
Named the area where the electrons are found the electron cloud. Modern Atomic Theory
Number of protons in the nucleus of an atom. Atomic Number
Atom that has the same number of protons as other atoms of the same element do but that has a different number of neutrons. Isotope
Sum of numbers of protons and neutrons in the nucleus of an atom. Mass Number
The mass of an atom expressed in atomic mass units. Atomic Mass
Greek philosopher who believed atoms could be cut into small pieces. Aristotle
Greek philosopher who believed atoms were single material and could be cut into small pieces. Democritus
English scientist who believed atoms were small particles that could not be cut, divided , or destroyed . Dalton
Plum Pudding Model. He believed electrons moved through the atoms.Looked like a ball with push pins in it. Thomson
Discovered the nucleus was positively charged part of an atom and found in the center of an atom. Rutherford
Discovered energy level. Bohr
Named the area where the electrons are found the electron cloud. Modern Atomic Theory
Created by: pookie19999
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