Atomic models through Time Flashcards
Whats the radius of an atom
What is the basic unit of matter?
An atom.
True or False: Protons have a negative charge.
False.
Fill in the blank: The nucleus of an atom contains _____ and _____.
protons; neutrons.
What particle determines the chemical properties of an atom?
Electrons.
Which subatomic particle has a positive charge?
Proton.
Multiple Choice: Which of the following is not a subatomic particle? A) Proton B) Electron C) Neutron D) Molecule
D) Molecule.
What is the mass number of an atom?
The sum of protons and neutrons in the nucleus.
True or False: Electrons orbit the nucleus in fixed paths.
False.
What is the charge of a neutron?
Neutral.
Fill in the blank: The number of protons in an atom determines its _____ on the periodic table.
atomic number.
which statement best describes isotopes
Atoms with the same number of protons but not the same number of neutrons
What is the atomic number
The number of protons, these are positively charged
The mass number?
the number of protons and neutrons which are both located in the nucleus
What was Niels Bohr Discovery?
Electrons exist in shells and orbit the nucleus at specific distances
What is the correct order of discovery as the atomic model develops
Electron,Proton,Nucleus
What is the size of an atom(not the radius)
3x10- 9metres
