Question

complete the following information for helium.

of protons 2

of electrons 2

complete the following information for beryllium.

of protons 4

of electrons 4

complete the following information for boron.

of protons 5

of electrons 5

complete the following information for nitrogen.

of protons 7

of electrons 7

complete the following information for carbon.

complete the following information for oxygen.

of protons 8

of electrons 8

of neutrons

total number of particles
group
period

of neutrons

total number of particles
group
period

of neutrons

total number of particles
group
period

of neutrons

total number of particles
group
period

of neutrons

total number of particles
group
period

Explanation:

Step1: Recall atomic - related facts

For a neutral atom, the number of protons = number of electrons. The atomic number gives the number of protons. The mass number (approximate) gives the sum of protons and neutrons. Elements' group and period can be found from the periodic table.

Step2: Helium

The atomic number of helium (He) is 2. Number of protons = 2, number of electrons = 2. The most common isotope of helium has 2 neutrons. Total number of particles=2 (protons)+2 (electrons)+2 (neutrons)=6. Helium is in Group 18 and Period 1.

Step3: Beryllium

Given number of protons = 4, number of electrons = 4. For the most common isotope of beryllium, number of neutrons = 5. Total number of particles=4 (protons)+4 (electrons)+5 (neutrons)=13. Beryllium is in Group 2 and Period 2.

Step4: Boron

Given number of protons = 5, number of electrons = 5. For the most common isotope of boron, number of neutrons = 6. Total number of particles=5 (protons)+5 (electrons)+6 (neutrons)=16. Boron is in Group 13 and Period 2.

Step5: Nitrogen

Given number of protons = 7, number of electrons = 7. For the most common isotope of nitrogen, number of neutrons = 7. Total number of particles=7 (protons)+7 (electrons)+7 (neutrons)=21. Nitrogen is in Group 15 and Period 2.

Step6: Carbon

Given number of protons = 6, number of electrons = 6. For the most common isotope of carbon, number of neutrons = 6. Total number of particles=6 (protons)+6 (electrons)+6 (neutrons)=18. Carbon is in Group 14 and Period 2.

Step7: Oxygen

Given number of protons = 8, number of electrons = 8. For the most common isotope of oxygen, number of neutrons = 8. Total number of particles=8 (protons)+8 (electrons)+8 (neutrons)=24. Oxygen is in Group 16 and Period 2.

Answer:

Element	# of Protons	# of Electrons	# of Neutrons	Total Number of Particles	Group	Period
Beryllium	4	4	5	13	2	2
Boron	5	5	6	16	13	2
Nitrogen	7	7	7	21	15	2
Carbon	6	6	6	18	14	2
Oxygen	8	8	8	24	16	2