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Atoms Isotopes & Ions Old Guys Periodic Table Mystery? 10 Point 10 Point 10 Point 10 Point 10 Point 20 Points 20 Points 20 Points 20 Points 20 Points 30 Points 30 Points 30 Points 30 Points 30 Points 40 Points 40 Points 40 Points 40 Points 40 Points 50 Points 50 Points 50 Points 50 Points 50 Points
What has to be true for a atom to be neutral?
Is must have the same number of protons (+) and electrons (-) In other words it can not be a ion
What determines the identity of a element?
The atomic number
An atom of Ag with 47 p+ 47 e- and 61 n0 would have a mass number of what?
108
How are ions formed?
Ions are formed with an atom gains or looses electrons
Why are all atoms of an element the same?
The number of protons in each atom are the same
What type of force holds the nucleus together?
A STRONG Nuclear Force
What does the current model of a atom suggest?
An electron cloud surrounds the nucleus
A atom of Plutonium with 94 protons 94 electrons and 145 neutrons would have a mass number of what?
Plutonium-239
How do Isotopes exist for the same elements? What is different?
Isotopes have a different number of neutrons from the original atom
How many Neutrons are in a atom of C-14?
8
Who preformed the Gold Foil Experiment?
Rutherford
What does the term “atomos” mean and who first coined it?
Can’t be divided, Democritus
Which delightful man discovered the electron?
Thomson
What were peoples reactions when Democritus proposed the idea of an uncuttable particle?
Poor Democritus no one believed him because of that mean ol’e Aristotle
Who believed that an atoms positive charge was located in the nucleus?
Rutherford
Elements that do not ordinarily form compounds are called what?
Noble Gases
How did Mendeleev first organize the periodic table?
Increasing atomic mass
What are the two most common Alkaline Earth Metals?
Calcium and Magnesium
Elements that are poor conductors at room temperature are classified as what?
Nonmetals
What do elements in the same column of the periodic table have in common?
Their properties
What are atoms composed of?
Protons, Neutrons and Electrons
What does the number of protons in a atom represent?
The atomic number
According to the Periodic Table what determines the identity of an element?
Atomic Number
How many Neutrons are in a atom of Calclum?
20
What are the horizontal rows of the period table called?
Periods
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Final Answer
Final Question