Structure 1.2

Question 1

Which atom doesn’t have a nucleus composed of neutrons and protons?

Answer 1

Hydrogen

Question 2

The radius of an atom is in the order 10^-10. What is the nucleus in the order of?

Answer 2

10^-1m

Question 3

What does in the order of mean?

Answer 3

Half the distance from adjacent atoms in the same element

Question 4

Atomic number (Z)

Answer 4

Total number of protons in the nucleus of an atom - identifies the element

Question 5

Mass number (A)

Answer 5

The number of protons and neutrons in an atom

Question 6

Mass spectrometer

Answer 6

Vaporised sample is inject, ionsied, accelerated and deflected. Smaller mass, higher charge, more it will be deflected

Question 7

Relative abundance

Answer 7

Percentage of an isotope in a naturally occurring sample of the element

Question 8

Nucleon

Answer 8

Protons and neutrons in the nucleus

Question 9

Radioisotope

Answer 9

The unstable form of an element that emits radiation to transform into a more stable form

Question 10

Isotope

Answer 10

Atoms of the same element that have the same atomic number but a different mass number. Same number of protons but different number of neutrons.

Question 11

What is the difference between relative atomic mass and atomic mass?

Answer 11

Atomic mass is the sum of protons and neutrons in the nucleus, and relative atomic mass is the weighted mean of natural isotopes of the element

Question 12

What is relative atomic mass?

Answer 12

The weighted mean of the naturally occurring isotopes of the element relative to the C-12 atom

Question 13

What are atomic masses based off?

Answer 13

Carbon 12 scale