Which fact was most likely discovered between the time of mendeleev’s table and the time of moseley’s table that moseley develop his version? atomic mass is the average mass of different samples of the same element. different elements can have similar chemical properties even if their atomic masses are different. the number of protons in an atom is different than the atom’s total mass. protons strongly affect an element’s atomic mass, while the electrons in atoms do not.

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?

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. which is most likely to result in the greatest amount of error in their scientific experiment? a.one student measures the plant stem widths by using calipers. the other student measures the widths of the same plant stems again by using a different pair of calipers. b.one student measures the plant stem widths by using calipers. the other student types the measurements as they are taken into a computer spreadsheet. c.one student weighs liquids for the experiment by using a calibrated scale. the other student weighs liquids for the experiment by using a different calibrated scale.

What is the difference between a scientific hypotheses and a scientific theory?