What is a chemical element? a collection of bonded atoms

an element only needed in small amounts by the body

a pure chemical substance made of one type of atom

a molecule made of different types of atoms

How are people today protected from poop 50 points

Describe 3 ways you can make sure you understand what your boss is asking for in his/her email or memo?

Which statement describes the u.s organ donation system? a. about 200 lives are saved per year b. transplant recipients must pay for organs c. the waiting lists for organs are very long d. it is mandatory