Question

uhm can someone help me​

Answer 1

Answer:

Q and z

Explanation:

because they have same atomic number

Answer 2

Hiya!,

Your answer is below :)

1)Element Q has an atomic number as 17 and mass as 34

Element Z has an atomic number as 17 and mass as 37.

As atomic number is same.

Element Q and Z are isotopes.

2)Isotopes are elements with same atomic numbers and different atomic masses.

As Atomic number is same and mass is different in Q & Z they are called isotopes.

Hope it helps

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