Question

the atomic number and the mass number of atoms relate to their numbers of protons and neutrons. use what you know about mass numbers and atomic numbers to complete the table. name atomic number number of protons number of neutrons mass number helium 2 2 4 carbon 6 6 12 oxygen 8 8 16 sodium 11 11 12 chlorine 17 17 35

Explanation:

Step1: Recall the relationship

Mass number = Number of protons + Number of neutrons.

Step2: Calculate for helium

Number of neutrons = Mass number - Number of protons. For helium, 4 - 2 = 2.

Step3: Fill in carbon's proton number

The atomic number is equal to the number of protons. For carbon, atomic number is 6, so number of protons is 6.

Step4: Fill in oxygen's atomic number

The atomic number is equal to the number of protons. For oxygen, number of protons is 8, so atomic number is 8.

Step5: Calculate for sodium

Mass number = Number of protons + Number of neutrons. For sodium, 11+ 12 = 23.

Step6: Calculate for chlorine

Number of neutrons = Mass number - Number of protons. For chlorine, 35 - 17 = 18.

Answer:

Name	Atomic Number	Number of Protons	Number of Neutrons	Mass Number
carbon	6	6	6	12
oxygen	8	8	8	16
sodium	11	11	12	23
chlorine	17	17	18	35