The structure of the periodic table is based on the distribution of a- protons b- electrons in each element. the elements are arranged in horizontal a- periods b- groups vertical a- periods b- groups

B- electrons, A- periods, B- groups

The correct answer is Option A, Option A and Option B.

Explanation:

Elements in a periodic table are distributed in 7 Periods and 18 Groups.

The elements are distributed on the basis of increasing atomic numbers. Atomic number is defined as the number of protons that are present in an element.

Thus, the elements in the periodic table are distributed based on the distribution of protons.

The elements are arranged in vertical columns known as Groups and in horizontal rows known as Periods.

Hence, the correct answer is Option A, Option A and Option B.

pla·gia·rism

/ˈplājəˌrizəm/

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noun

the practice of taking someone else's work or ideas and passing them off as one's own.

explanation:

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