Flashcards
Untitled
Cards in this deck (20)
- 1Is Carbon Dioxide Element or Compound?Compound
- 2Is Oxygen an element or compound?Element
- 3Is H2O a compound or element?Compund
- 4Is Beryllium an element or compound?Element
- 5What is an element?A single naturally occurring substance
- 6What is a compound?Two or more elements chemically connected.
- 7What is a mixture?Two or more elements not chemically connected.
- 8What is filtration?Using filter paper or a sieve to separate a mixture into individual compounds or elements.
- 9What is Crystallisation?A way of separating a solid that has dissolved into a liquid. You boil the liquid so that it dissolves and leaves the solid. The result also means crystals will grow.
- 10What is Distillation?Distillation is the process of separating the components or substances from a liquid mixture by selective boiling and condensation. You boil the liquid which condenses through a tube and drips into another beaker.
- 11What is Chromatography?Simple chromatography is carried out on paper. A spot of the mixture is placed near the bottom of a piece of chromatography paper and the paper is then placed upright in a suitable solvent. As the solvent soaks up the paper, it carries the mixtures with it. Different components of the mixture will move at different rates.
- 12Who first came up with the idea of Elements and when?In 400Bc Democratic said that materials were made of small particles which could not be divided. He however had no evidence.
- 13Who was the first person to go into detail about atoms and when?In 1803 John Dalton used his observations to describe an atom in more detail, saying it was like a billiard ball.
- 14Who discovered the electron and when?In 1897 J . J . Thompson discovered the electron
- 15Who made the plum pudding model?J . J . Thompson
- 16What is the Plum Pudding Model?It is a diagram of atoms in the form of a plum pudding
- 17Who discovered the Nucleus in an atom and when?Marsden and Ernest Rytherford
- 18What is the charge in the nucleus?Posotive
- 19What are electrons charge?Negative Charge
- 20—
Information
- Description
- Flashcards on Untitled, created by Zak O'Mahoney on 09/05/2018.
- Created by
- Zak O'Mahoney
- Views
- 3
- Rating
More on Pure Substances and Mixtures