Chapter 2 - Atoms, ions and compounds

Question 1

Mass/kg, RM, RC of protons, neutrons and electrons

Answer 1

Mass/KG, RM, RC
Protons 1.672 x 10^-27, 1 , +1
Neutrons 1.675 x 10^-27, 1 , +1
Electrons 9.109 x 10^-31, 1/1836, -1

Question 2

Relative isotopic mass definition

Answer 2

The mass of an atom of an isotope compared with 1/12 of the mass of an atom of carbon-12

Question 3

Relative atomic mass definition

Answer 3

is the mean mass of an element compared with 1/12 of the mass of an atom of carbon-12

Question 4

Mass spectometry uses:

Answer 4

Identify unknown substances
determine abundance of isotope
info about the structure of a molecule

Question 5

Mass spectometry steps:

Answer 5

Ionisation chamber - electron gun will shoot and knock off an electron from its energy level forming a + ion
Accelerated
Deflected
Detected

Question 6

Isotopes definition

Answer 6

Isotopes are atoms of the same element with different numbers of neutrons and different masses.

Question 7

Binary compounds

Answer 7

Contains two elements.
To name a binary compound use the name of the first element but change the ending of the second elements name to -ide.
Ionic compounds - metal ion always comes first.

Question 8

Polyatomic ions

Answer 8

Sometimes, an ion may contain atoms of more than one element bonded together.