Question

22 what are the atomic mass of
) (oxygen
(11) Sodium.​

Answer 1

Answer:

oxygen-16

sodium-23 or 22.99

Explanation:

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Answer 2

Required Answer:-

Atomic mass of :-

• (a) Oxygen = 16
• (b) Sodium = 23

How to find atomic mass of given elements :-

${\pink{\bigstar}}{\footnotesize{\underline{\boxed{\bf Atomic \: mass = No \: of \: protons + No \: of \: neutrons}}}}$

Example:

★ Find the atomic mass of magnessium (Mg) :-

We know that,

Atomic number of Mg is 12.

No of electrons in Mg = 12

No of protons in Mg = 12

Therefore,

Atomic mass no = No of electrons + No of neutrons

Atomic mass no of Mg = 12+12

Atomic mass no of Mg = 24