Properties of Subatomic Particles

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Presentation transcript:

Properties of Subatomic Particles Protons: Amount of positive charge varies among elements Proton: ___________ charged, found in _________ charge: 1+ nucleus must contain at least one

Properties of Subatomic Particles Electrons Detected by ____________ Electron: __________ charged, found _______ nucleus charge: 1

Properties of Subatomic Particles Neutrons: 1932, James _______________ Concluded: Neutral because a charged object didn’t cause ________________ Neutron: ____________particle, found in ____________ Mass almost exactly equal to a ____________’s

Comparing Subatomic Particles How particles behave No instrument shows the inside of an atom Using Mass, Charge, and Location

Atomic Number: Atomic Number and Mass Number Number of ___________ in an atom of that element All atoms an element have the same atomic number Each element has a unique atomic number Atoms are ______________ Atomic number also equals the number of _______ in an atom of that element.

Atomic Number and Mass Number Examples: A The atomic number of sulfur (S) is 16. B The atomic number of iron (Fe) is 26. C The atomic number of silver (Ag) is 47.

Atomic Number and Mass Number ________ of the protons and neutrons To find the number of neutrons, you need: mass number atomic number

Isotopes Atoms of the same element that have different numbers of _________________ different __________ numbers Named by _____________ numbers Example: oxygen has 3 isotopes: oxygen-16, oxygen-17, oxygen-18 all three can react with hydrogen to form water or with iron to form rust

Isotopes Hydrogen isotopes are an exception: noticeably different __________________ Hydrogen-1 (Almost all hydrogen), Hydrogen-2, Hydrogen-3 Hydrogen-1 has one proton, so adding a neutron doubles its mass ____________________: contains hydrogen-2 in place of hydrogen-1