Science assesmient 25/11/24 Flashcards
What are all substances made up off
Atoms
What does s, l, g stand for
Solid , liquid , gas
Name for two or more substances not chemically combined together
Mixture
Name for two substances that are chemically combined together
Compound
Name of material made up from only 1 type of Atom
Element
Process used to separate liquids with different boiling points
Fractional distillation
What process is used to separate a liquid and an insoluble solid
Filtering
What process is used to detect the different dyes in food colouring
Chromatography
Who came up with the idea of the plum pudding
Jj Thompson
Which scientist proved that there was a dense positive nucleus
Ernest Rutherford
What is the name of the negative subatomic particle
Electron
What is the name of the positive subatomic particle
Proton
What is the name of the neutral subatomic particle
Neutron
What does the atomic number of an atom show
The number of protons
What is the atomic mass number the sum off
Number of protons and neutrons
What do u call the atom of the same element
Isotope
What is the name of a charged atom
Ion
What is the name of group 0
Noble gasses
Name of group 1
Alkali metals
Name of group 7
Halogens
What gas is formed when a alkali metal reacts with water
Hydrogen
How does the reactivity of halogens change as u go up the group
They become more reactive
How does the reactivity of the alkali metals change as you go down the group
They become more reactive
How many electrons are on the outer shell of group 1 metals
1 electron
