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14 Cards in this Set

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Atoms are small particles that cannot be ______________?
Atoms are small particles that cannot be created, divided, or destroyed.
What are electrons?
Negatively charged, found in electron clounds, and mass is almost zero.
What are protons?
Positively charged, found in the nucleus, mass is 1 amu
What are neutrons?
Have no charge, found in the nucleus, mass is 1 amu
What two particles make up the nucleus?
Protons and Neutrons
Is the protons the same as the atomic number? (T or F)
True
The element Gold (Au) has 79 protons and the atomic mass is 197; How many neutrons are there?
118
Electrons do or do not travel in definite paths.
Electrons do not travel in definite paths.
To get the number of neutrons, you subtract the mass number from the atomic number? (T or F)
True
Who stated that electrons can jump between levels?
Bohr
If there is 56 protons and 81 neutrons, what is the atomic mass?
137
What is a isotope?
An atom that have the same number of protons but have different numbers of neutrons.
Atoms of an element are not alike. (T or F)
False, atoms of an element are exactly alike
Can atoms join with another atom to make a new substance?
Yes