What is the difference between the number of electrons in an atom of bromine, Br, and the number of electrons in an atom of calcium, Ca

7. describe two strategies that parents can use to cope with stress. 8. describe the three types of childcare available to families. 9. what can parents do to be more involved in their children's education at home and at school? 10. which factors should a parent consider when choosing a childcare option?

The activity of the modern sample is 1.10 bq . how long does that measurement take?

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry