Question

Identify the Name, Symbol, number of protons, neutrons, and electrons in a neutral atom of each of the following: (Please refer to a periodic table):

Answer 1

Carbon

Name: Carbon

Symbol: C

Number of protons: 6

Number of neutrons: 6 or 7 (Carbon has two stable isotopes with 6 or 7 neutrons)

Number of electrons: 6

Sodium

Name: Sodium

Symbol: Na

Number of protons: 11

Number of neutrons: 12 or 13 (Sodium has one stable isotope with 12 neutrons, and another with 13 neutrons)

Number of electrons: 11

Helium

Name: Helium

Symbol: He

Number of protons: 2

Number of neutrons: 2

Number of electrons: 2

Chlorine

Name: Chlorine

Symbol: Cl

Number of protons: 17

Number of neutrons: 18 or 20 (Chlorine has two stable isotopes with 18 or 20 neutrons)

Number of electrons: 17

Gold

Name: Gold

Symbol: Au

Number of protons: 79

Number of neutrons: 118 (Gold has only one stable isotope with 118 neutrons)

Number of electrons: 79