Answer:
Halogens
Explanation:
From the given choices, the halogens will have the smallest radius within the same period.
The size of an atom is estimated by the atomic radius. This is taken as half of the inter-nuclear distance between two covalently bonded atoms of non-metallic elements or half of the distance between two nuclei in the solid state.
- Across a period in the periodic table, atomic radii decrease progressively from left to right.
- Down a group from top to bottom, atomic radii increase progressively due to the addition of successive shells.
Since halogen is the right most group from the choices given, it will have the smallest radius.
Answer is 6 Na + (aq) +3 CA swaured + 6 CI- (aq)
Answer:
Properties of Alkaline Earth Metals
shiny.
silvery-white.
somewhat reactive metals at standard temperature and pressure.
readily lose their two outermost electrons to form cations with a 2+ charge.
low densities.
low melting points.
low boiling points.
Explanation:
Her discovery of radium and polonium.
She was the first woman to win a nobel prize and a second one as well!
Marie Curie was the first women to be appointed as the director of the physics lab at Sorbonne.
She was also the first woman to become a professor at the University of Paris.
She helped make radiology units which were again portable and those assisted the field surgeons during the war.
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answer:an arrangement of elements in columns, based on a set of properties that repeat from row to row
Explanation:
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