An element's atomic number is 5. how many electrons would an atom of this element have? your

Atomic number = number of protons = number of electrons = 5

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The number of electrons is 5

Atom as a whole is a neutral particle and a neutral atoms of an element contain an equal number of protons and electrons. The number of protons shows an element's atomic number represented by (Z) and distinguishes one element from another. As we said atom is a neutral particle so there must be the equal number of electrons too. So number of protons and electrons are equal. If atomic number is 5 then number of electrons are 5 too.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

no sign of dia of fuel cell