Atoms , Ions and compounds

Question 1

What is the mass of an electron?

Answer 1

1/1836th the mass of a proton (negotiable)

Question 2

Function of the neutrons:

Answer 2

holds the nucleus together as protons repel each other due to their positive charge so neutrons separate the subatomic particle.

Question 3

positive ions are known as

Answer 3

Cations

Question 4

Negative Ions are known as

Answer 4

Anions

Question 5

All isotopes have different….

Answer 5

Physical qualities (mass, density, melting and boiling point)

Question 6

Which element acts as the standard for working out relative mass?

Answer 6

Carbon-12

Question 7

Definition of relative isotopic mass

Answer 7

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

Question 8

Definition of relative atomic mass

Answer 8

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

Question 9

What is the unit of atomic mass?

Answer 9

u

Question 10

What is needed to calculate the weighted mean?

Answer 10

1. number of isotopes
2. mass of isotopes
3. abundance

Question 11

What is used to measure mass?

Answer 11

Mass spectrometer

Question 12

Name the two functions of a mass spectrometer

Answer 12

measures mass and abundance

Question 13

Mass spectrometer journey :

Answer 13

1. sample is place in and vaporized
2. sample is ionized to form positive ions
3. Ions accelerate towards detector due to negatively charged plates.
4. Heavy ions travel more slowly than light ions
5. Information is displayed as a graph