6. Most halogens form compounds (Hint: what is their charge?)*

Their charge is —1

Explanation:

Halogens form ionic compounds by receiving 1 electron from a metallic atom to obtain their octet configuration. This is clearly seen when sodium(Na) react with chlorine(Cl) to form sodium chloride (NaCl) as shown below:

Na —> Na+ + e-

Cl + e- —> Cl-

Combining both equation together, we have:

Na + Cl + e- —> Na+ + Cl- + e-

Eliminate the e-

Na + Cl —> Na+Cl-

From the ionic equation we can see that the charge of the Halogen (Cl) is —1

firearm identification is the process of analyzing the bullets and cartridge cases left at a crime scene to determine if they came from a particular firearm. marks on the bullets and cartridges may be common to every firearm of that type. these are called class characteristics.

conservation of mass

mass before something happens = mass afterwards