Topic 1-5 Flashcards
Sketch an atom, Label the nucleus and the electrons.
Phone//
What is the charge of a proton?
+1
True or false? Elements contain more than one type of atom.
False
Give the formula for:
a)Carbon dioxide b)Sodium carbonate
C02
Na2CO3
Balance these equations:
a)Mg + O2 —> MgO b) H2SO4 +Na2SO4 +H2O
a) 2MgO
b) H2SO4 +2NaOH —> Na2SO4 +2H20
What is the difference between a compound and a mixture?
Mixtures are easily separated unlike compounds.
What is the name of the pattern formed from carrying out paper chromatography?
Pattern of spots called chromatogram
Which method of separation is useful to separate an insoluble solid from a liquid.
Filtration
Which method of distillation would you use to separate a soluble solid from a liquid.
Evaporation
Crystallisation
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?
Rutherford
Who first devised an experiment that proved the existence of the neutron?
James Chadwick, evidence for neutral particles in the nucleus.
What is the electronic structure of sodium?
2,8,1
Why did Mendeleev leave gaps in his Table of Elements?
For undiscovered elements.
How are the group number and the number of electrons in the outer shell of an element related?
The group number is the number of electrons in outer shell.
What kind of ions do metals form?
Ionic bond
Where are non-metals on the periodic table?
Right side
Give three properties which are specific to transition metals.
More than one ion
Often coloured
Make good catalysts.