Which element is a metalloid?

a. argon (ar)

b. silicon (si)

c. potassium (k)

d. magnesium (mg) ?

What are the negative and positive impacts to society of making and using plastic bags?

Why do we use molecular models to represent atoms?

After ensuring the equipment is turned off and unplugged what is the next step in cleaning large equipment by hand

Which of the following describes a Brønsted-Lowry base? a hydrogen ion acceptor an electron pair donor an electron pair acceptor a hydrogen ion donor

The tapeats sandstone in the grand canyon is an example of a clastic sedimentary rock. such clastic sedimentary rocks can be distinguished from biochemical sedimentary rocks by

How does the state of matter affect the speed of sound

Which of the processes is exothermic? 1. evaporation of alcohol 2. sublimation of iodine 3. solidification of volcanic lava 4. burning of paper

The maximum amount of solute that dissolves in a given amount of solvent and forms a stable solution is called the

Which determines the chemical properties of minerals? A. cleavage B. crystal shape C. type of atoms D. luster

Why is pure orange juice a mixture?