Based on the graph, it can be concluded that the isotope which is most likely to be found with 6.25% of its original amount in 16 billion years? A. Rubidium-87
B. Uranium-238
C. Potassium-40
D. Thorium-235

Which statement best describes how atoms combine to form sodium chloride (nacl)? a. a positively charged sodium ion and a positively charged chlorine ion form an covalent bond. b. a positively charged sodium ion and a negatively charged chlorine ion form an covalent bond. c. a positively charged sodium ion and a positively charged chlorine ion form an ionic bond. d. a positively charged sodium ion and a negatively charged chlorine ion form an ionic bond.

Water molecules have a strong attraction to each other because of hydrogen bonding, allowing water to move against gravity up a plant's stem through capillary action. true false

1) these are barrel shaped microtubules in most animal cells, that organize the spindles during cell division