Differentiating Star Clusters
Sort the descriptions of open clusters and globular clusters into the correct categories
no more than a few thousand stars
Open Clusters
Globular Clusters
disorganized
tightly packed
more than a million stars
made of older stars
loose

Asample of radium-226 will decay 1/4 of its original amount after 3200years. what is the half-life of radium-226?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Schrodinger and heisenberg developed an alternate theory about atomic nature that contradicted some of bohr's model of the atom. how do changes resulting from new technology and evidence affect the reputation of the atomic theory?