C1 Flashcards
What is the charge of a proton?
+1
True or false? Elements contain more than one type of atom.
False
Give the formula for carbon dioxide
CO2
Give the formula for Sodium carbonate
Na2CO3
Balance the equation Mg+02 = Mg0
2Mg+02 = 2MgO
Balance the equation H2SO4 + NaOH = Na2SO4+H2O
2NaPH+H2SO4 = Na2SO4+2H2O
What is the difference between a compound and a mixture?
Compounds are substances formed by the chemical combination of two or more elements. Mixtures are substances formed by physically mixing two or more substances together.
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 the method to seperate a soluble solid from a liquid.
Simple distillation
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
What is the electronic structure of sodium?
[Ne] 3s1
Why did Medleev leave gaps in his Table of Elements?
So he could place elements not known at the time
How are the group number and the number of electrons in the outer shell of an element related?
The number of electrons in the outer shell of all the elements in a group is the same as the group number.
What kind of ions do metals form?
Positively charged ions called cations.
Where are non-metals on the periodic table?
The right
State three trends as you go down Group 1
Increase in reactivity, lower melting and boiling points, and higher relative atomic mass.
State the products of the reaction of sodium and water
A colourless solution is formed, consisting of strongly alkalic sodium hydroxide (caustic soda) and hydrogen gas.
How do the boiling points of halogens change as you go down the group from fluorine to astatine?
Increase going down group 7
What is the charge of the ions that halogens form when they react with metals?
The halide ion will have a negative charge and the metal ion will have a positive charge.
Predict whether iodine is displaced by chlorine in a solution of potassium iodide.
Iodine is displaced
What is the trend in boiling point as you go down Group 0?
Boiling point increases
