How many electrons will be in the second shell of sodium that has an atomic number of 11?

8 electrons

Explanation:

Sodium (Na) has atomic number 11, hence, 11 electrons. The electron configuration is: 1s²2s²2p⁶3s¹. This means the first shell (1s) has 2 electrons. The second shell (2s and 2p) has a total of 8 electrons.

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.