Question

b) An atom of an element X contains 20 protons, 20 electrons and 20 neutrons.
i. Write the symbol of the ion with charge formed by the element X.
ii. Write the atomic number and atomic mass of the element.

Answer 1

Answer:

a) 20Ca40, b)Calcium- Atimic mass= 40.08

Explanation:

Answer 2

Answer:

$\color{red} \: the \: element \: is \:$

Ca

ii)THE ATOMIC NUMBER OF Ca:

$\color{pink} \: 20$

The atomic mass is :

$\color{red} \</strong><strong>:</strong><strong>40.07</strong><strong>\: u$

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