Give electron configurations for atoms of these elements: na, s, mg, ne, and k.

Answer :

The electronic configuration of sodium atom is,

The electronic configuration of sulfur atom is,

The electronic configuration of sulfur atom is,

The electronic configuration of sulfur atom is,

The electronic configuration of sulfur atom is,

Explanation :

Electronic configuration : It is defined as the representation of electrons around the nucleus of an atom.  

Number of electrons in an atom are determined by the electronic configuration.

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

(a) The given atom is, sodium (Na)

Atomic number of Na = 11

Number of electrons = 11

The electronic configuration of sodium atom is,

(b) The given atom is, sulfur (S)

Atomic number of S = 16

Number of electrons = 16

The electronic configuration of sulfur atom is,

(c) The given atom is, magnesium (Mg)

Atomic number of Mg = 12

Number of electrons = 12

The electronic configuration of sulfur atom is,

(d) The given atom is, neon (Ne)

Atomic number of Ne = 10

Number of electrons = 10

The electronic configuration of sulfur atom is,

(e) The given atom is, potassium (K)

Atomic number of K = 19

Number of electrons = 19

The electronic configuration of sulfur atom is,

the answer is c

tell me if wrong

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.