13 terms

4.2

The Structure of an Atom
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Name three subatomic particles
Protons, electrons, and neutrons
Name three properties you could use to distinguish a proton from an electron
Protons, electrons, and neutrons can be distinguished by mass, charge, and location in an atom
Which characteristic of an atom always varies among atoms of different elements?
Atoms of different elements have different numbers of protons
How are the isotopes of an element different from one another?
Isotopes of an element have the same atomic number but different mass numbers because they have different numbers of neutrons
What do neutrons and protons have in common? How are they different?
They are similar because they are both located in the nucleus but they are different because they have different charges and masses
How can atoms be neutral if they contain charged particles?
If atoms have the same amount of positive charged particles as negative charge particles then the charges cancel each other out and the atom becomes neutral
Whats the difference between atoms of oxygen-16 and oxygen-17?
Oxygen-16 has 8 neutrons while oxygen-17 has 9 neutrons.
proton
a positively charged subatomic particle that is found in the nucleus of an atom
electron
a negatively charged subatomic particle that is found in the space outside the nucleus
neutron
a neutral subatomic particles that is found in the nucleus of an atom
atomic number
it equals the number of protons in an atom of that element
mass number
the sum of the protons and neutrons in the nucleus of that atom
isotopes
atoms of the same element that have different numbers of neutrons and different mass numbers