Which change to a system will most Ilkely cause a change in a simple electrical circuit? a reducing the temperature of the system
O adding a second light bulb to the system
moving the system to a different location
increasing the light level outside the system

hope this

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)

answer:

technetium is the most reactive. this is followed by silver. the least reactive out of these three elements is strontium.