Atomic structure and the periodic table Flashcards
What is the charge of a proton
+1
What are elements
If a substance contains atoms with the same number of protons it’s an element
Give the formula for: Carbon dioxide and Sodium carbonate
CO2 and Na2CO3
What is the difference between a compound and a mixture?
Compounds are formed from two or more elements which have chemically react and are held together by chemical bonds. Unlike in a compound there’s no chemical bond in parts of a mixture.
What is the name of the pattern formed from carrying out paper chromatography?
Chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid?
Filtration
Give the name of a method to separate a soluble solid from a liquid.
Evaporation or cristallisation
Which method of distillation would you use to separate liquids with similar boiling points?
Fractional distillation
Who discovered that the plum pudding model was wrong?
Ernest Rutherford
Who first devised an experiment that proved the existence of the neutron?
James Chadwick
Why did Mendeleev leave gaps in his Table of Elements
To make sure that elements with similar properties stayed in the same groups. They indicated the existence of undiscovered element.
How are the group number and the number of electrons in the outer shell of an elements related.
The group number is the same as the number of electrons in its outer shell
What kind of ions do metals form?
Positive
Where are non-metals on the periodic table
On the right side
Give three properties which are specific to transition metals
Can have more than one ion, are often coloured and make good catalysts.
