Which statement is true? isotopes are atoms of different elements which have the same mass. isotopes of a given element have equal numbers of neutrons. isotopes of a given element have very similar chemical properties. isotopes of a given element have equal numbers of protons and neutrons. isotopes are atoms that have gained or lost electrons.

The correct statement is isotopes of a given element have very similar chemical properties.

Explanation:

Isotopes are defined as the species which have same atomic number. They are defined as the substances which have same number of protons but have different number of neutrons.

As, these species have same atomic number. So, they have same number of protons and electrons.

And the species which have same number of electrons will show similar chemical properties.

Thus, the correct statement is isotopes of a given element have very similar chemical properties.

the awnser is group 12

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally