Select a word from the drop-down menu to correctly complete the statement. The elements fluorine, chlorine, and iodine are all part of the same
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on the periodic table.

Fluorine and chlorine are gases. Bromine is one of only two liquid elements, and iodine is a solid.

 Fluorine and chlorine are gases. Bromine is one of only two liquid elements, and iodine is a solid

Explanation:

"among the transition metal elements, manganese and zinc have a slight lowering of electronegativities. the reason behind this is that the nuclear charges of these elements are slightly weaker than the other transition metal elements due to the way their valence electrons are filled up. both manganese and zinc have their valence electrons filled up to the 4th shell with 1 pair of electrons (4s2) completely occupying it. although the electrons in the 3rd shell (3d) are yet to be paired since the outer most shell is filled up, the ability of the nucleus to attract electrons is lessened. hence,   the electronegativity (or the ability to attract electrons) is lessened."

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl