The diagram below is an artist’s impression of a single atom of element Be. The neutrons are shown with stripes, the protons are
gray, and the electrons are black. These particles are not drawn to scale. mc017-1.jpg Which element below could be an isotope of this atom? sodium-10 beryllium-10 boron-9 carbon-9
2 answers:
Answer is: beryllium-10.
The diagram shows that atom has 4 protons, 5 neutrons and 2 valence electrons.
Atomic number is the number of protons, which is characteristic of a chemical element, beryllium (Be) is an element with atomic number 4.
Two valence electrons means that atom is from 2. group of periodic table, only beryllium is from that group; sodium (1. group), boron (13. group) and carbon (14. group).
Beryllium-10 has 6 neutrons, so it is isotope (different number of neutrons or mass number).
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