Biology Ch 2 Connect 2

The various substances called _______ are the building blocks of matter.

A substance that cannot be broken down into simpler substances is called an

Substances that dissociate in water and release hydrogen ions are called ______.

In a molecule of water the oxygen atom is _____ electronegative than the hydrogen atoms.

The property of water that makes it possible for rocks to skip on water is called _______  ______.

Isotopes are atoms of hte same element that differ in what way?

Radiation may be used in which two ways?

To sterilize equipment
to produce PET scans
To kill tumor cells
To trace the path of an element in the body

radioactive isotopes injected into biological systems for use in tracking are called ___.