Edexcel A-Level Chemistry AS 2.3 What Is Meant By the Terms Atomic Proton Number and Mass Number Topic Practice

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Question 1

[Maximum number: 2]

Atomic numbers and mass numbers are used to identify isotopes.

Question (a)

(a)

What is the mass number of the isotope 3684Kr{ }_{36}^{84} \mathrm{Kr} ?

A

36

B

48

C

84

D

120

[ 1 ]

Question (b)

(b)

Which element has the atomic number 15 and mass number 31?

A

Ga

B

P

C

Pd

D

S

[ 1 ]
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