The half life of titanium 44 is 60 years. If you start with 600 grams, how much will be left after 180 years

Explanation:

t = Time = 180 years

= Half-life of titanium = 60 years

= Initial amount of titanium = 600 g

We have the relation

The mass that is left after 180 years is .

since the atomic number is the number of protons in the nucleus, as we move to the left on the periodic table, the electrostatic pull between the nucleus and the valence electron shell decreases. as we move down a group (vertical column), the valence shell energy level gets further and further from the nucleus.