Vocabulary
Name the vocabulary word:
The smallest unit of an element that maintains the properties of that element.
atom
The atomic number is the same as the number of ________ in an atom of the element.
protons
True or False?
You can see individual atoms with the naked eye.
False
Which two are located in the nucleus?
protons and neutrons
Name the vocabulary word:
A subatomic particle that has a positive charge and that is located in the nucleus of an atom.
proton
The mass number= _________ + ____________
protons and neutrons
Who discovered the proton?
A. John Dalton
B. JJ Thomson
C. Ernest Rutherford
D. Niels Bohr
C
Which has the most weight?
neutrons
Name the vocabulary word:
an atom's central region, which is made up of protons and neutrons.
nucleus
Name the vocabulary word:
A subatomic particle that has a negative charge
electron
Who was the first to state that all atoms of a certain element are identical?
A. JJ Thomson
B. John Dalton
C. Ernest Rutherford
D. Niels Bohr
B
Name the charge that goes with protons, neutrons, and electrons.
Protons-positive
Neutrons- neutral
electrons-negative
Name the vocabulary word:
The number of protons in the nucleus of an atom; the atomic number is the same for all the atoms of an element
atomic number
Name the vocabulary word:
A subatomic particle that has no charge and that is located in the nucleus of an atom.
neutron
Whose theory was that atoms were positive spheres with electrons mixed through it.
A. John Dalton
B. JJ Thomson
C. Ernest Rutherford
D. Niels Bohr
B
Which has no weight?
electron
Name the vocabulary word:
A region around the nucleus of an atom where electrons are likely to be found
electron cloud
Name the vocabulary word:
The sum of the number of protons and neutrons in the nucleus of an atom
mass number
What do electrons move within in the current atomic theory?
electron clouds
Protons and neutrons both have a mass close to
________ amu.
1