Which of the following is NOT true about sparks from electrostatic discharge?

a) Sparks can cause explosions at grain elevators.

b) Sparks can damage sensitive electronics.

c) Sparks can ignite gases used for anesthesia in an operating room.

d) Sparks can damage heart pacemakers.

e) Sparks are not dangerous in any way.

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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)

a. they are both space stations

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answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

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