Module 2, atoms, isotopes, etc

Question 1

Relative atomic mass

Answer 1

The weighted mean mass of an atom relative to 1/12th the mass of a carbon-12 atom

Question 2

Relative isotomic mass

Answer 2

The mass of an atom of an isotope relative to 1/12th the mass of an atom of carbon-12

Question 3

mass spectrometer ionization zone?

Answer 3

Sample atoms bombarded with high energy electrons which knock an electron off their outer shell leaving pos. ions

Question 4

Acceleration area

Answer 4

All atoms are accelerated to the same Ek

Question 5

mass spectrometer drift region?

Answer 5

Larger isotopes are separated from the smaller as they take different times to move up the drift zone.

Question 6

ion detector, mass spectrometer?

Answer 6

Detects the pos. ions using the time that they reach it to separate the different ions and calculate the % abundance and relative isotomic mass

Question 7

What is the required condition of the mass spectrometer?

Answer 7

Vacuum, so no air present for particles to collide with and be slowed down or diverted

Question 8

D block elements with 1 type of ion?

Answer 8

Silver(Au+), Zinc(Zn2+), Scandium(Sc3+)

Question 9

Polyatomic ions?

Answer 9

Groups of atoms covalent bonded which have then lost or gained electrons to become ions

Question 10

Nitrate V

Answer 10

NO3^-

Question 11

Nitrate III

Answer 11

(nitrite) NO2^-

Question 12

Cyanide

Answer 12

CN^-

Question 13

Hydrogencarbonate

Answer 13

HCO3^-

Question 14

Hudrogensulfate

Answer 14

HSO4^-

Question 15

manganate (VII)

Answer 15

(permanganate) MnO4^-

Question 16

Amonium

Answer 16

NH4^+

Question 17

carbonate

Answer 17

CO3^2-

Question 18

Sulfate (VI)

Answer 18

(sulfate) SO4^2-

Question 19

Sulfate(IV)

Answer 19

sulfite SO3^2-

Question 20

dichromate (VI)

Answer 20

Cr2O7^2-

Question 21

Thiosulfate

Answer 21

S2O3^2-

Question 22

phosphate

Answer 22

PO4^3-

Question 23

Giant covalent structures

Answer 23

Boron, silicon, carbon

Question 24

compound made of 2belements?

Answer 24

binary compounds

Question 25

empirical formula? 3

Answer 25

The simplest whole number ratio of atoms of each element in a compound (giant structures)

Question 26

molecular formula?

Answer 26

actual number of atoms of each element in a compound (simple molecules)

Question 27

Ar is the same as?

Answer 27

molar mass(atoms), relative molecular formula (Mr, molecules) and relative formula mass (ionic compounds)

Question 28

hydrogen sulfide

Answer 28

H2S

Question 29

phosphorus?

Answer 29

P4

Question 30

reduce %age uncertainty?

Answer 30

Use a greater mass of a substance, use higher resolution apparatus