Students were asked to design an experiment to determine what affects the period of a pendulum. which of the following should be the dependent variable(s) for the experiment? a. the angle of the swingb. the length of the string onlyc. the mass of the bob only d. the length of the string and the mass of the bob

Use vsepr theory to predict the molecular geometry of the molecule hcn.

The smallest particle of an element that retains its identity in a chemical reaction. true or false

Which pair below describes isotopes of the same element? a) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons b) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons c) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons d) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons