Which of these characteristics will produce the most dense water? -High salinity, high temperature

-High salinity, low temperature

-Low salinity, high temperature

-Low salinity, low temperature

Write the chemical symbols for three different atoms or atomic cations with 27 electrons. asap!

How did planetesmals form planets? a. they broke apart into smaller chunks. b. they collided and stuck together. c. they cooled and pulled ice together. d. they began to rotate.

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.