Isotopes and Relative Atomic Mass Flashcards

1
Q

What is meant by the mass number of an atom?

A

The combined total of protons and neutrons in an atom

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which subatomic particle do atoms of the same element always have the same number of?

A

Protons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

How can you calculate the number of neutrons in an atom?

A

Mass number - atomic number

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Give the definition of the term ‘isotopes’.

A

Atoms of the same element that have the same number of protons but a different number of neutrons

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Give the definition of the relative atomic mass of an element.

A

The average mass of one atom of the element, compared to 1/12th of the mass of one atom of carbon-12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Explain why some elements have relative atomic masses that are not whole numbers.

A

Relative atomic mass is an average of the mass numbers of all the different isotopes of an element, taking into account the abundance of each one

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

(Exam-style question)

A
How well did you know this?
1
Not at all
2
3
4
5
Perfectly