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;
34 Cards in this Set
- Front
- Back
- 3rd side (hint)
Atom |
Little building blocks that contain electrons, neutrons and protons |
Blocks |
|
Elements |
Multiple of the same atom form to make elements |
Compound |
|
Compounds |
Combination of 2 or more elements that are chemically bound together |
Bound |
|
Molecules |
A combination of multiple atoms (element or compound) |
General term |
|
Mixtures |
2 or more things that are combined but are not chemically bound together |
2+ |
|
What did Mendelev do in 1864? |
Produced a table based on atomic weights but arranged by elements with similar properties under each other. |
Based on atomic weights |
|
What did Mendelev do in 1869? |
Changed the table to what we see today |
|
|
What did William Ramsay do in 1894? |
Discovered the noble gases |
|
|
What did Marie and Pierre Curie dp in 1898? |
Isolated radium and polonium from pitchblende? |
Isolation |
|
What did Henry Moseley do in 1913? |
Determined the atomic number of each of the elements and modified the 'Periodic Law' |
Modification |
|
What did Glenn Seaborg do in 1940? |
Synthesised transuranic elements (the elements after Uranium in the Periodic Table) |
Elements after Uranium |
|
Condensation |
A gas turning into a liquid by decreasing the temperature |
Decrease |
|
Melting Point |
The temperature at which a solid turns to a liquid |
|
|
Boiling point |
The temperature at which a liquid changes to a gas |
|
|
Isotope |
An element with a different number of neutrons. |
|
|
Distillation |
The process of separating a mixture at one of the liquids boiling points when that liquid has evaporated, then you cool and condense so they separate. |
Separation |
|
Property of all metals |
High boiling and melting point |
|
|
Property of chlorine |
Kills bacteria, sterilysing |
|
|
Property of helium |
Low density |
|
|
Name the noble gases |
Helium, Neon, Argon, Krypton, Xenon, Radon |
|
|
How many electrons do alkali metals have on their outer shell? |
One |
|
|
What changes are made as we go down the group when talking about shells?
|
They increase by one shell |
|
|
What do alkali metals want to do?
|
Lose one electron so they have a full outer shell
|
|
|
Why do the alkali metals find it easier to lose the one electron as we go along the group? |
They decrease in attraction between the nucleus and the outer shell |
Attraction |
|
What do Halogens want to do? |
Gain one electron so they have a full outer shell |
|
|
How does halogen displacement work? |
The less reactive halogen displaces the more reactive halogen causing a colour change and changing which halogen is present. |
|
|
Name 2 differences between alkali metals and halogens |
Alkali metals are metals but halogens are non-metals.
Alkali metals have a high melting/boiling point but halogens have a low melting/boiling point. |
|
|
Name 3 similarities of alkali metals and halogens |
They both want to be stable and have a full outer shell.
They both increase by one shell as you go down the group. Both are one electron away from having a complete outer shell. |
|
|
Name 3 properties of Noble Gases |
Noble gases are tasteless, colorless and odorless. They aren't flammable in standard conditions. They are ordered according to their boiling point in the Periodic Table. |
|
|
Fractional Distillation
|
Separation of a liquid mixture into fractions differing in boiling point by means of distillation, typically using a fractionating column. |
|
|
Paper Chromatography |
Paper chromatography is an analytical method used to separate colored chemicals or substances. |
|
|
What process pushes food down the gullet? |
Peristalsis |
|
|
What is a long chain of amino acids? |
Proteins |
|
|
What acid does the stomach produce? |
Hydrochloric acid |
|