Question

an cation X -2+ has 10 electron and 12 neutron . what is atomic number of X. what is symbol of this cation . what is mass number of X.​

Answer 1

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The given atom has 23 protons and 23 electrons, so its atomic number is 23. It also has 27 neutrons, so its atomic mass number is 23+27 = 50.

So,

A

=

50

Z

=

23

An element X is denoted by

A

Z

X

, so this element will be represented by

50

23

X

From the periodic table, we know that the element with atomic number 23 is Vanadium so the element will be represented by

50

23

V

Since the atomic number of Vanadium won't change, the isotope symbol is given by

50

hope this helps ✌️✌️

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Answer 2

Explanation:

Atomic number is 11.

Symbol is Na.

mass is 22.

I hope it help you.