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Unit 2 Atoms

Unit 2 Atoms Review

QuestionAnswer
What is the positive particle located in the atom’s nucleus? proton
What is the negative particle located in the atom’s orbitals? electron
What is the neutral particle located in the atom’s nucleus? neutron
Name of the outermost electrons valence electrons
What is the maximum number of electrons that the first energy level can hold? 2
What is the maximum number of electrons that the 2nd or 3rd energy level can hold? 8
What is the center core of the atom? nucleus
Which atom is most reactive, the atom with one valence electron or the atom with 8 valence electrons? 1
What to valence electrons do (what is their role)? chemical bonds
Where is a majority of the mass of the atom found? nucleus
What two parts of the atom are found in the nucleus? proton and neutron
How is atomic mass calculated? sum of proton and neutron
Why do electrons not count into the atomic mass? too small to count into the mass
Why is an atom electrically neutral? It has equal protons(+) as electrons(-)
How do you calculate protons? equals the atomic number
How do you calculate electrons? equals the atomic number
How do you calculate neutrons? atomic mass- atomic number
Calculate PEN for Phosphorus. 15P, 15E, 16N
Calculate PEN for Carbon. 6P, 6E, 6N
Calculate PEN for Oxygen 8P, 8E, 8N
Calculate PEN for Argon. 18P, 18E, 22N
Calculate PEN for Nitrogen. 7P, 7E, 7N
An element’s Bohr model has 9 protons. Name that element. Fluorine
An element’s Bohr model had 5 protons. Name that element. Boron
Which scientist had the Bowling ball model and stated that everything is made of atoms? John Dalton
Which scientist had the plum pudding model and state that they atom had + and – charges? JJ Thomson
Which scientist had the nuclear model that identified the positively charged nucleus? Ernest Rutherford
Which scientist had the Bohr model? Neils Bohr
Created by: lschramme