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atoms,bonds & groups

what are the name of the elements in group 7? name 3 of them. Halogens-Fluorine, Bromine, iodine, Asrtitine, Chlorine.
give an example and definition of a covalent bond. h20, chemical bond between atomes with shared pairs of electrions.
give an example of an ionic bond and the definition. NaCl-the electrostatic attraction between oppisitley chaerged ions.
what is the definition of isotopes? atoms of the same element with the same number of protons but different number of neutrons.
what does a group 2 element with water produce? write down the word and symbol equation. e.g magnesium and water→ magnesium hydroxide and hydrogen Mg+H2O→Mg(OH)2+ H2
Created by: sarahmooney