1. a liquid is matter because it
a) is hard,
b) has its own shape,
c) has mass and takes up space. d) living things could not survive
without it.

Achemist has dissolved a certain substance in water. the chemist knows that more of the substance could be dissolved into the water before it stops dissolving. therefore

At stp, which substance is the best conductor of electricity? a. nitrogen b. neon c. sulfur d. silver

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3