Isotopes

Isotopes are atoms of the same element with the same number of _____________ but different number of ______________.

• protons, electrons

• protons, neutrons

• neutrons, protons,

• neutrons, electrons

The NEUTRAL atoms of all isotopes of the same element contain the same number of

• electrons and protons

• electrons and neutrons

• neutrons only

• neutrons and protons

Chlorine exists as two isotopes. One has a nucleon number (mass number) of 35 and the other has a nucleon number (mass number) of 37. Which table shows the correct numbers of protons and neutrons in the isotopes?

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The figure represents three different nuclei. State and explain which nuclei are from different isotopes of the same element.

The nuclei of four neutral atoms are represented using nuclide notation as shown in picture. Neutral atoms also contain electrons. State which of the four nuclei is surrounded by the greatest number of electrons. (Write down the answer like this: 12C6, 14C6, 14N7 or 15O8)

From these four nuclei, state the two nuclei that have the same number of protons:

(Write down the answer like this: 12C6, 14C6, 14N7 or 15O8 with the word 'and' in between)

From these four nuclei, state the two nuclei that have the same number of nucleons:

(Write down the answer like this: 12C6, 14C6, 14N7 or 15O8 with the word 'and' in between)

From these four nuclei, state the two nuclei that have the same number of neutrons:

(Write down the answer like this: 12C6, 14C6, 14N7 or 15O8 with the word 'and' in between)