A) All Nitrogen atoms have 7 protons. - correct answer
Explanation:
You find the nitrogen (N) in the group 15, period 2 of the periodic table. The the atomic number of nitrogen is 7 and from this we deduce that nitrogen have 7 protons and 7 electrons.
A) All Nitrogen atoms have 7 protons. - correct
B) The mass number of Nitrogen is 21. - incorrect, the mass number of nitrogen is 14.
C) All Nitrogen atoms have 14 protons. - incorrect, all nitrogen atoms have 7 protons.
D) Nitrogen atom has more protons than a Fluorine anion. - incorect, fluorine (F) have an atomic number of 9 so it will have 9 protons, which is less than the number of nitrogen protons.
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atomic number
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True... water and land mostly covers up the earth... go anywhere and there is water...
Copper is the mineral most likely used to make the plumbing pipe.
The other options are unlikely, as copper is the best for these kinds of pipes.
2H₂ + O₂ = 2H₂O
m(H₂O)=2M(H₂O)m(O₂)/M(O₂)
m(H₂O)=2*18*8/32= 9 g
Collision theory basically explains that gas-phase chemical reactions occur when molecules collide with sufficient kinetic energy.
