What is the term used to describe the number of protons plus the number of neutrons in an atom?

Which group of elements are the most reactive

Which statement is correct about transition metals? Select one: a. They have incompletely filled d subshells. b. They form ions with incompletely filled d subshells. c. They form paramagnetic compounds. d. They have catalytic activity. e.

4) express 55mg in kilograms

Which of the following is true of the mass of an object? Its mass is measured on a scale. It is measured on a balance. Its mass depends on the force of gravity in the object's location. Its mass is how much it weighs.

Which method would be best to separate a mixture of sugar and water? separation by density separation by particle size filtration distillation

Record the length of the line shown in millimeters

Convert 15.0 inches to meters. Show detailed work

Titration experiments require the use of a ... Watch glass Burette Crucible Bunsen burner

Hat is the ultimate source of energy for the Earth? a. photosynthesis b. respiration c. the sun d. nutrient cycles

If an object sinks in water it's density is less than that of water true or false