Which statement best describes electrons?(1) They are positive subatomic particles and are found in the nucleus.(2) They are pos
itive subatomic particles and are found surroundingthe nucleus.(3) They are negative subatomic particles and are found in thenucleus.(4) They are negative subatomic particles and are found surrounding the nucleus.
The answer should be (4) they are negative subatomic particles and are found surrounding the nucleus. The nucleus is formed by neutrons and protons. Neutrons are neutral and protons are positive.
2 mol NaCl = 2 x 6.02 x 10 23 = 1.204 x 10 24 NaCl formula units 2 mol NaCl = 2 (2 x 6.02 x 10 23 )= 2 (1.204 x 10 24) = 2.408 x 10 24 atoms *2 moles of sodium chloride contains 2.408 x 10 24 ions (combination of Na + ions & Cl – ions). H
