Module 3 Vocab
Scientists!
Decoding the Periodic Table
Isotopes
Miscellaneous
100
Smallest particle of matter that retains the properties of a certain element
Atom
100
Thought matter was composed of earth, air, water, and fire, and denied the existence of atoms
Aristotle
100
How many protons does an atom of sodium (Na) have?
11
100
What does the variable, a, represent in the following nuclide notation: ab X
Mass Number
100
Atomic mass is commonly measured in ______ _______ ______.
atomic mass units (amu)
200
Subatomic particle that does not reside in the nucleus
Electron
200
First person to propose the existence of atoms
Democritus
200
How many electrons does an atom of copper (Cu) have?
29
200
What does the variable, b, represent in the following nuclide notation: ab X
Atomic Number
200
Draw and label Thomson's "plum pudding" model on the board.
300
Represents the sum of an element's protons and neutrons
Mass Number
300
Determined the mass and charge of an electron through his oil-drop experiment
Millikan
300
What element has an atomic mass of 79.904 amu?
Bromine (Br)
300
How many electrons does 4622 Ti have?
22
300
What does the variable, a, represent in the following formula? Weighted average atomic mass = (m1a1) + (m2a2) + (m3a3)...
natural/percent abundance of isotope (decimal form)
400
Atoms of the same element with different numbers of neutrons
Isotope
400
Due to advancements in science, his atomic theory both revived and revised the atomic theory of Democritus
Dalton
400
The number of protons in an atom identifies it as an atom of a particular element. The number of protons is referred to as the _______ ________.
Atomic Number
400
How many neutrons does 4018 Ar have?
22
400
Name a difference between Thomson's plum pudding model and Rutherford's nuclear model of the atom.
- The nuclear model shows that an atom consists mostly of empty space through which electrons move.
- The nuclear model shows that almost all of the atom's positive charge and almost all of its mass are contained in the nucleus.
500
The weighted average mass of the isotopes of an element
Atomic Mass
500
Proposed the "nuclear" model of the atom
Rutherford
500
How many electrons does the atom, Ca2+ have?
18
500
How many neutrons does 11750 Sn have?
67
500
How many electrons does the atom, F- have?
10