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| Question | Answer |
| Module 6.1 | By Rahma Abdelgadir |
| What are the building blocks of the universe? |
Atoms
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| How many types of atoms are there? | 100 types of atoms |
| What microscope can see atoms? |
Scanning tunnelling microscope (STM)
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| What are elements? | Elements are substances that are made upon only one atom. |
| Examples of elements | 1. Copper 2. Oxygen 3. Iron 4. Hydrogen 5. Gold |
| Define properties | Unique set of characteristics of a substance |
| How are elements divided? | Metallic and non-metallic elements |
| Examples of metallic elements | 1. Aluminum 2. Iron 3. mercury 4. Sliver 5. Calcium |
| Metal properties | 1. Lustrous 2. Solid at room temp 3. Good conductors of heat and electricity 4. Malleable 5. Ductile |
| Examples of non-metallic elements | 1. Carbon 2. Iodine 3. Chlorine 4. Sulfer 5. Radon |
| Non-metallic properties | 1. Dull 2. Bad conductors of heat and electricity (insulators) 3. Brittle |
| Whats special about mercury? | Its the only metal liquid at room temperature |
| Whats special about bromine? |
Its the only non-metallic element liquid at room temperature.
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| Where are all the elements placed? |
In a table called the periodic table
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| How many elements are there in the periodic table. | 118 |
| How many man-made and natural? | 98 Natural 20 Man-made |
| How is the periodic table listed? | From lightest to heaviest |
| How can atoms exist | 1. Single atoms 2. Molecules 3. Crystal lattices |
| Define monatomic elements | An element that is made up of many individual atoms. They are very rare elements. |
| what are all the monatomic elements? | 1. Helium (He) 2. Neon (Ne) 3. Argon (Ar) 4. Krypton (Kr) 5. Xenon (Xe) 6. Radon (Rn) |
| Define molecules | There are clusters of two or more atoms joined together. |
| W | Elements that are identical and are mostly non-metallic. |
| Examples of molecular elements | 1. Nitrogen molecule 2. Phosphorus molecule 3. Sulfur molecule |
| In each oxygen molecule how many atoms does it contain? | Two oxygen atoms |
| What are crystal lattices? | They are large grid-like structures that repeat the similar arrangement of atoms over an over. |
| What percentage of elements are metals? | 80% Metal elements |
| What is special about metal lattices? | The atoms in metal lattices can move across one another, which allows them t be bent, hammed and drawn into wires. |
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