PART 1: Reviewing Matter Directions: Read the selection below. Underline the MAIN idea of each paragraph and answer the questions at the bottom of the page.

Everything in the universe is either matter or energy. If it has mass and takes up space it is matter. Energy does not have mass or volume; for example, light is energy.

Atoms are the most basic unit of matter. They are everywhere and make up everything except energy. Look around you. It is all atoms. Not just the solid things like walls and tables and chairs, but the air in between. And the number of atoms in any object or substance is almost impossible to imagine. That’s because they are very, very tiny. Half a million atoms lined up shoulder to shoulder could hide behind a human hair!

Atoms are also hard to destroy, and they survive for very long periods of time. As a result, atoms really get around. Every atom used to construct your body has almost certainly passed through several stars and been part of millions of organisms on its way to becoming you. Yes, atoms are recycled in nature, and it is likely that some of your atoms once belonged to Shakespeare, Genghis Khan, or any other figure you can think of from ancient history.

Although atoms are basic, they have parts. The center of the atom is called the nucleus. In the nucleus, you will find protons and neutrons, which are attracted together with a force stronger than anything we’ve ever experienced! Tiny electrons spin around the nucleus, leaving lots of empty space in between. Each type of atom has a different number of protons, neutrons and electrons. For example, the atom Hydrogen (H) has one proton, one electron, and no neutrons, while the atom Helium (He) has two of each.

The building blocks of matter are known as elements. Each element is made up of only one kind of atom. Over the centuries, scientists have worked to organize all the known elements of the universe into a specialized chart called the Periodic Table of Elements. Using chemical symbols to represent each element, the chart is used by scientists around the world. It makes no difference what country you are in or what language is spoken there; the language of chemistry is the same all over the world.

1. Explain matter in your own words:

2. Explain atoms in your own words:

3. What is the difference between elements and atoms?

Periodic Table HomeworkDue: Friday, September 8, 2017

Name: ______________________________Teacher: ____________ Period: ____

=

=

=

4CHCo =

=3H

=

2CO

compound.

element or as either examples Label the following

below with the correct symbol or element:

Use the periodic table to fill in the boxes

____ Period: ________ ____Teacher:

______________________________Name:

Friday, September 9, 2011 :Due

workScience Home