What is the name of the device that sense the current flowing, tripping the circuit, and cutting off the electricity?

a.
ground fault circuit interrupter (gfci)

b.
lockout/tagout

c.
circuit breaker box

d.
deactivated breaker

The alkali metals (group 1) consist of lithium (3), sodium (11), potassium (19), rubidium (37), cesium (55), and francium (87). they are soft, metallic solids with low densities and low melting points. based on the data shown in figure 1, how many valence electrons do alkali metals share?

How are isotopes of the same chemical element alike? how are they different?

Consider the four elements above. which one of these elements will combine with oxygen in a 1: 1 ratio?