Material safety data sheets are used to give information about a solvent. The excerpt below is part of an MSDS. Which information is given in this section of the MSDS?

fire safety
glassware safety
chemical use safety
disposal safety

i believe the answer is 5,000

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.