How many protons, neutrons and electrons are in these atoms?

A. Proton = 6

Neutron = 7

Electron = 6

B. Proton = 56

Neutron = 74

Electron = 56

C. Proton = 92

Neutron = 140

Electron = 92

Explanation:

A. Mass number = 13

Atomic number = 6

Proton = Atomic number = 6

Since the element has no charge,

Electron = proton = 6

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 13 — 6 = 7

B. Mass number = 130

Atomic number = 56

Proton = Atomic number = 56

Since the element has no charge,

Electron = proton = 56

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 130 — 56 = 74

C. Mass number = 232

Atomic number = 92

Proton = Atomic number = 92

Since the element has no charge,

Electron = proton = 92

Mass number = proton + Neutron

Neutron = Mass number — proton

Neutron = 232 — 92= 140

given:

mass of na = 115 g

excess cl2

to determine:

mass of nacl produced

explanation:

given reaction is-

2na(s) + cl2(g) → 2nacl(s)

since cl2 is in excess, na will be the limiting reagent

as per the reaction stoichiometry na: nacl = 1: 1

i.e. moles of na reacted = moles of nacl formed

now, # moles of na = mass of na/atomic mass

                                  = 115 g/23 g.mol-1 = 5 moles

therefore, moles of nacl = 5

molar mass of nacl = 58 g/mol

mass of nacl = 5 moles * 58 g.mol-1 = 290 g

ans: amount of nacl produced = 290 g

i don't see a text, but i am gonna assume this *orbit* the curved path, usually elliptical, described by a planet, satellite, spaceship, etc., around a celestial body, as the sun.