Card Set Information
is the smallest particle that has all the properties of an element
what are the The fundamental particles of an atom .
The fundamental particles of an atom are the electron, the proton, and the neutron.
what type of charge does the PROTON carry
The proton carries one unit of positive electric charge.
what type of charge does the neutron carry
The neutron carries no charge; it is electrically neutral.
what determines the chemical element
The number of protons determines the chemical element
Atoms that have the same number of protons but differ in the number of neutrons are
what is the electrical charge of an atom
In their normal state, atoms are electrically neutral; the electric charge on the atom is zero.
If an atom has an extra electron or has had an electron removed, it is said to be
the removal or addition of an orbital electron from an atom
how many electrons can an outer shell have
No outer shell can contain more than eight electrons.
The force that keeps an electron in orbit is the
Atoms that have the same atomic number but different atomic mass numbers are .
Atomic nuclei that have the same atomic mass number but different atomic numbers are.
Atoms that have the same number of neutrons but different numbers of protons are .
what has the same atomic number and the same atomic mass number.
Atoms of various elements may combine to form structures called .
The smallest particle of an element is an atom; the smallest particle of a compound is a.
the emission of particles and energy in order to become stable
what results in emission of alpha particles, beta particles, and usually gamma rays
the time required for a quantity of radioactivity to be reduced to one-half its original value.
The half-life of a radioisotope
3.3 half lives =
1 tenth life
particle is a helium nucleus that contains two protons and two neutrons.
what is an electron emitted from the nucleus of a radioactive atom.
A beta particle is
X-rays and gamma rays are often called