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Discovering The Atom
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Element "Ca" stands for...
Calcium
Element "N" stands for...
Nitrogen
Element "Na" stands for
Sodium
Element "H" stands for...
Hydrogen
What are the 3 types of matter?
solid, liquid, and gas
Who believed atoms cannot be divided, created, or destroyed.
Democritus and Dalton
Who believed matter was made up of water, earth, fire, and air?
aristotle
What is an example of matter that can be a solid, liquid, and gas?
water
What is matter?
A physical substance that has mass or takes up space.
What is an atom?
An atom is the smallest unit of matter.
What molecules are inside of the nucleus of an atom?
neutron and protons
Why are electrons outside of the nucleus?
Electrons are outside the nucleus and orbit about it because they are attracted to the positive charge in the nucleus.
How many electrons does this element have? (charge = -10)
92
How many neutrons does this element have?
125
How protons does this element have?
82
What is the atomic mass of this element?
207
What type of charge does a neutron have?
no charge
What type of molecule has a positive charge?
proton
How many electrons does this element have? (charge=0)
73
How many neutrons does this element have?
108
How many protons does this element have?
73
What is the atomic number of this element?
73
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