Atoms
What are three types of subatomic particles
What is protons, electrons, neutrons
Who describes the structure of the atom as a dense, positively charged nucleus surrounded by mostly empty space?
Who is Rutherford
The sum of the protons and neutrons in an atom equals the
What is mass number
What is a reason why the atomic masses on the periodic table are generally not whole numbers?
What is the atomic mass of an element is the weighted average of the masses of its isotopes
Isotopes of the same element have different
What is mass numbers
What distinguishes the atoms of one element from the atoms of another?
What is the number of protons
Who's atomic theory included that the atoms of the same element are always identical
Who is Dalton
The mass of a neutron nearly equals the mass of
What is a proton
The atomic number also is an indication of what
What is protons in the nucleus
How do the isotopes of hydrogen-1 and hydrogen-2 differ?
What is hydrogen-2 has one neutron, hydrogen-1 has none.
How do you calculate the number of neutrons in an atom?
What is subtract the atomic number from the mass number
Atoms contain tiny, negatively charged electrons is which scientists discovery?
Who is J.J. Thomson
This unit is used to measure weighted average atomic mass.
What is amu
All atoms of the same element have the same
What is atomic number
The abbreviation for atomic mass unit is
What is amu
True or False:
The nucleus of an atom fills up the entire atom?
False
The neutron was discovered by
Who is Chadwick
The total number of protons and neutrons in the nucleus of an atom is
What is mass number
What is the one or two letter abbreviation on each element known as
What is the atomic symbol
Atoms of the same element that have different masses are called
What is isotopes
The atom is electrically neutral because
What is the number of protons and electrons are equal
What did Rutherford conclude when the particles passed straight through the gold foil?
What is atoms were mostly empty space
Atomic number equals the number of
What is protons or electrons
What is the number below the atomic name known as
What is the atomic mass
The average atomic mass of an element depends on both the masses of its isotopes and each isotope's
What is percent abundance