Why do elements that are in the same group of the periodic table share similar properties? A. They all have the same number of electrons in the outer shell.
B. They all have the same atomic mass.
C. They are all metals.
D. They are all very reactive with other elements.

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.

the statement is true