| A | B |
|---|
| Matter | ___ is anything that has mass and takes up space. |
| property | A ___ is a characteristic of a substance that can be used to identify the substance. |
| Chemistry | ___ is the scientific study of the composition, structure, properties, and reactions of matter. |
| artificial fibers, drugs, dyes, fertilizers, and plastics | Name some products that resulted from chemical research. |
| chemical | Color changes in plant leaves and flowers are examples of ___ properties. |
| atom | An ___ is the basic unit of all matter. |
| electron | An ___ is a negatively charged particle that moves around the nucleus of an atom. |
| neutron | A ___ is a particle having no electric charge and found in the nucleus of an atom. |
| nucleus | The ___ is the central part of an atom. |
| proton | A ___ is a positively charged particle in the nucleus of an atom. |
| Hydrogen | ___ is the only element with a nucleus made of one proton and no neutron. |
| Electrons | ___ are used for many devices including television pictures, X-rays, and to illuminate objects in microscopes. |
| Neutrons & protons | ___ & ___ make up 99.9 % of an atom’s mass. |
| metal | one of a group of elements that are usually solid at room temperature, are shiny, and conduct heat & electricity well |
| nonmetal | one of a group of elements that cannot be polished, is brittle, and does not conduct heat or electricity |
| element | any substance made of only one kind of atom |
| Silicon | ___ is a useful semimetal that can be obtained from sand and is used to make chips for electronic devices. |
| protons | An element's atomic number is the number of ___ in its nucleus. |
| He | What is the symbol for Helium? |
| Na | What is the symbol for Sodium? |
| Au | What is the symbol for Gold? |
| Fe | What is the symbol for Iron? |
