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WorksheetsAtoms and Reactions (Module 2.1)
Total questions: 45
Worksheet time: 35mins
What is the relative weight of an electron?
1/1000
1/2000
-1
0
Isotopes of the same element have...
Same mass
Different mass
Same number of protons and electrons
Different number of neutrons
The atomic number is also known as..
A(proton number)
z (proton number)
A (neutron number)
Z ( neutron number)
What is the mass number also known as?
z ( proton number)
A ( proton number)
A (nucleon number)
z (nucleon number)
Different isotopes of the same element react...
Differently
Similarly
The same
Oppositely
What is the letter symbol for the relative atomic mass?
Mr
Ar
Br
Zr
A molecule is ...
Simple contently bonded
Ionic bonded
Any bonded elements
A pair of bonded elements
- is the mean of an atom of an isotope compared with 1/12th of the mass of an atom of carbon-12
(a)
Relative Atomic Mass- the weighted mean mass of an atom of an element compared with 1/12th of the mass of (a)
What are the units of relative atomic mass?
g/cm2
g
mol
There are no units
Which elements don't normally form ions?
Beryllium
Boron
Carbon
Silicon
What is the overall charge in an ionic compound?
-1
0
+1
+2
Avogadro constant...
3.01 x 10^23
6.02 x 10^24
6.02 x 10^23
7.02 x 10^23
1 mol of atoms is equal to its...
(a)
Molar mass is measured in...
mol-1
mol/dm3
g/mol
g
mass/molar mass =
(a)
Number of moles x molar mass =
(a)
What is empirical formula used for?
Simple covalent bonds
Giant structures
Diatomic atoms
Ionic compounds
Define Empirical Formula..
(a)
The number and type of atoms of each element in a molecule
(a)
RTP means..
(a)
One mole of gas occupies..
24dm3
48dm3
2400cm3
480m3
volume of gas/ 24 =
(a)
What is the gas constant?
(a)
To turn Celsius to Kelvin...
+273
+225
-273
+255
In the Ideal Gas Equation, what unit is the volume in...
Cm3
Dm3
m3
mm3
A solution that has a large amount of solute per dm3 is...
(a)
A solution that has a small amount of solute per dm3 is...
(a)
What is this equation for?
(a)
What equation is this for?
(a)
Acids have a pH less than 7. Which is not a common laboratory acid?
Sulfuric Acid (H2SO4)
Hydrochloric acid ( HCl )
Nitric Acis ( HNO3)
Lactic Acid (C3H6O3)
All acids contain hydrogen. When they are in an aqueous solution what ion does an acid release?
(a)
Bases are hydrogen acceptors. Which of these are common bases?
Amines
Ammonia
Metal Oxides
Metal Hydroxides
Alkalis have a pH lower than 7. When put in an aqueous solution, what ions do they release?
(a)
Which of these are common alkalis?
Sodium hydroxide ( NaOH)
Potassium Hydroxide ( KOH)
Ammonia (NH3)
Lime Water ( Ca(OH)2 )
Salts are produced in neutralization reactions between acids and bases. What kind of compounds are they?
Ionic
Covalent
Metallic
Diatomic
The positive ion/cation in a salt compound is usually:
(a)
The negative ion/anion in a salt compound is from the...
(a)
A salt has the same formula as the parent acid, but the H+ ions have been replaced by...
Positive ions
Negative ions
Chloride ions
Sodium ions
Anhydrous crystals contain no water. How do hydrated crystals contain water?
Water of crystallization
Side reactions
Excess water
Steam
What method can be used to get rid of the water of crystallisation from hydrated crystals?
(a)
Titration reactions can be used to calculate an unknown...
The concentration of a solution
Molar mass
Formula
Number of molecules of water of crystallisation
Methyl Orange goes from red to (a)
Bromothymol Blue goes from yellow to...
(a)
Phenolphthalein turns from pink to
(a)
