Identify whether each element is a halogen, a noble gas, or nonmetal only
Astatine (At):
Nitrogen (N)
Krypton (Kr)
Chlorine (CI): nonmetal only
Sulfur (S): nonmetal only

At halogen

N Noble gas

Kr halogen

Cl nonmental

S nonmental

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explanation:

covalent bonds

consist of pairs of electrons shared by two atoms, and bind the atoms to fixed orientation and requre high energies to break them

ionic bonds

when two atoms differ considerably in their electronegativity, then one of the atoms will lose its electron to the other atom. this results in a positively charged ion(cation) and a negatively charged ion (anion)

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation: