Circle the term that best completes each of the following sentences.
- A chemical bond joins atoms / electrons
together in a water molecule.
- The four valence electrons of a carbon atom are
in its innermost / outermost energy level.

A10nc charge sits at a point in space where the magnitude of the electric field is 1500 n/c. what will the magnitude of the field be if the 10 nc charge is replaced by a 20 nc charge? assume the system is big enough to consider the charges as small test charges.

An astronaut throws a rock. the rock travels through outer space at a constant velocity. which statement applies to the motion of this rock? a- an unbalanced force is acting on the rock, causing it to accelerate. b-the rock will undergo constant acceleration until a force acts on it. c- the rock will continue on its current path until an unbalanced force acts on it. d- the force that makes the rock move through space is equal to its mass divided by its velocity

To understand the concept of isomers and be able to answer questions relating to molecular formulas, structures, and condensed structures of isomers. molecules that have the same molecular formulas but different structures are called isomers. for example, hexane and 2-methylpentane have same the molecular formula, c6h14.