If you mean HALF LIFE, that is the length of time it takes a quantity of a radioactive element to lose half its radioactivity.
The half-life
The half-life is the time that it takes for 1/2 of a material to decay.
The half-life
False- the period is the horizontal row the element is in
Half-life
The length of time depends on the element and isotope, but the point at which half of the sample has decayed is known as the half-life.
The time it takes for half the atoms in a sample of a radioactive element to decay is called the half life.
The half-life
The half-life
The half-life is the time that it takes for 1/2 of a material to decay.
The half-life
False- the period is the horizontal row the element is in
Half life of an element can't be changed.. It is a characteristic of a radioactive element which is independent of chemical and physical conditions.. Half life is that time in which half of radioactive sample( i.e., a radioactive element) decomposes. So no matter what amount you take half life of an element remains same.
half life
...age of the sample.
Half-life
i got no idea