atoms and compounds
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| What are the electrons that are farthest from the nucleus? | valence
🗑
|
||||
| How many valence electrons can an element have? | 1 to 8
🗑
|
||||
| How many valence electrons make an atom stable? | 0, 2, or 8
🗑
|
||||
| What makes an atom neutral? | The same number of protons and electrons
🗑
|
||||
| When an atom becomes charged after gaining or losing electrons it becomes an..... | ion
🗑
|
||||
| When an atom loses an electron they have a.... | positively charged
🗑
|
||||
| When an atom gains an electron they become... | negatively charged
🗑
|
||||
| Name two ions | Na and Cl
🗑
|
||||
| Name two chemical bonds. | Ionic and Covalent
🗑
|
||||
| What is an ionic bond? | bond between metals and non metals
🗑
|
||||
| Ionic bonds produce compounds made up of hard crystals and have what kind of melting point? | high
🗑
|
||||
| what ending do you put on the second element in an ionic compound? | ide Ex: Sodium Sulfide
🗑
|
||||
| When does a covalent bond form? | When atoms share valence electrons
🗑
|
||||
| Where do covalent bonds happen? | between nonmetals
🗑
|
||||
| What kind of compounds are produced from ionic bonds? | molecular
🗑
|
||||
| Are molecular compounds poor or good conductors of heat? | poor Ex: H2o
🗑
|
||||
| What is a polar molecule? | a compound with slighlty charged ends
🗑
|
||||
| What is a nonpolar molecule | atoms that pull equally on the electrons
🗑
|
||||
| What is a chemical reaction? | when there is a chemical change in a substance
🗑
|
||||
| What evidence shows us that a chemical change has happened? | color, gas production, temperature, precipatate(liquids mixed to form a solid)
🗑
|
||||
| Substances you start with in a chemical reaction are called | reactants
🗑
|
||||
| The materials you are left with after a chemical reaction are called | products
🗑
|
||||
| What are the 4 types of chemical reactions called? | Exothermic, Endothermic, Synthesis, and Decomposition
🗑
|
||||
| In an exothermic reaction energy is | released
🗑
|
||||
| In an endothermic reaction energy is | absorbed
🗑
|
||||
| Name and example of an exothermic reaction | burning wood
🗑
|
||||
| Name an example of an endothermic reaction | instant ice pack
🗑
|
||||
| What is synthesis? | two or more substances combine to make a complex substance
🗑
|
||||
| What is decomposition? | a complex substance broken down in to simpler substances
🗑
|
||||
| What is the Law of Conservation of Mass? | The amount of matter involved in a chemical reaction does not change. Mass of Reactants=Mass of Products
🗑
|
||||
| What is activation energy? | the amount fo energy needed to get a reaction started
🗑
|
||||
| What is the collision theory? | reactant molecules collide with a certain amount of energy to react and form products
🗑
|
||||
| Catalysts | speed up reactions
🗑
|
||||
| Inhibitors | slow down chemical reactions
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
tbugbee
Popular Science sets