Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
14 Cards in this Set
- Front
- Back
|
HOW DID MENDELEEV ARRANGE THE ELEMENTS? |
HE PUT FORWARD THE LAW OF OCTAVES. HE ARRANGED THE ELEMENTS IN ORDER OF ATOMIC MASS. |
|
|
HOW DID MENDELEEV PREDICT THE EXISTENCE OF ELEMENTS? |
he would look at the properties of the elements around it and predict what the elements chemical properties and relative atomic mass off of that. |
|
|
WHAT ARE THE PROPERTIES OF ALKALI METALS? |
Alkali metals are: Soft. They have a very low melting points. |
|
|
WHAT ARE THE REACTIONS BETWEEN THE ALKALI METALS AND WATER? |
When a alkali metal reacts with water: Hydrogen gas is produced. A metal oxide is formed. The speed and violence of the reaction is increased as you go down group 1. |
|
|
WHY DOES THE REACTIVITY INCREASE AS YOU GO DOWN GROUP 1? |
The further down the table you go the more shells, this means that the one outer electron is further away from the positively charged nucleus meaning the electrostatic force is weaker this means that the electron can be pulled away easier. |
|
|
WHAT ARE THE PHYSICAL STATES OF THE HALOGENS? |
Chlorine - Green gas Bromine - Orange liquid Iodine - Grey solid |
|
|
WHAT DO THE HALOGENS PROPERTIES HAVE IN COMMON? |
All of the halogens have a very low boiling point |
|
|
WHAT IS THE CHEMICAL TEST FOR CHLORINE? |
it makes damp blue litmus paper turn red then bleaches it white |
|
|
HOW DOES A HALOGEN REACT WITH A GROUP 1 ELEMENT? |
When a metal and a halogen react the from a metal halide. + little 2)> ----> These are acidic and dissolve in water to from acidic solutions. |
|
|
WHAT HAPPENS WHEN A LESS REACTIVE COMPOUND COMES INTO CONTACT WITH A MORE REACTIVE HALOGEN? |
When a more reactive halogen comes into contact the less reactive halogen is replaced. |
|
|
WHY IS THIS? |
This happens because the elements higher up on the reactivity table have less shells meaning the electron is more attracted to the positively nucleolus. |
|
|
WHAT IS OXIDISATION? |
Oxidation can mean the gain of oxygen. It can also mean the loss of a electron. |
|
|
WHAT IS REDUCTION? |
reduction can mean the loss of oxygen. It can also mean the gain in a electron. |
|
|
WHAT ARE THE PROPERTIES OF THE NOBEL GASES? |
They have a full outer shell. they do not react with another atom. they are monotonic. |
