Question

learning to draw atoms
name zanashah /20 pts
we learned that the atom has 3 subatomic particles. fill in the table below describing each particle.
1)
subatomic particle
charge
location in the atom
2)
3)

1. you learned that the electrons surround the nucleus in rings called shells or orbitals.

a. how many electrons can fit on the 1st shell?
b. how many electrons can fit on the 2nd shell?
c. the 3rd shell holds the same number as the 2nd. therefore, how many electrons can fit on the 3rd shell?
directions for #3-6:
when drawing atoms, the 1st shell is like a front row of seats in an auditorium that only has 2 seats. once those seats are filled guests must move into the 2nd row and so forth. in an auditorium, seats will not be filled unless there are enough guests. the same things happens with the energy levels, shells or orbitals. they will only be filled with as many electrons as an individual atom has.
ex) hydrogen, h
atomic # = 1 (top # in h box on the periodic table)
mass # = 1 (rounded atomic mass from the periodic table)

protons = 1 (equal to atomic #)

electrons = 1 (also equal to atomic #)

neutrons = 0 (equal to mass # - atomic #)

image of hydrogen atom with electron, proton, neutron labels
ex) phosphorus, p
atomic # = 15 (top # in h box on the periodic table)
mass # = 31 (rounded atomic mass from the periodic table)

protons = 15 (equal to atomic #)

electrons = 15 (also equal to atomic #)

neutrons = 16 (equal to mass # - atomic #)

image of phosphorus atom with electron shells

1. helium, he

atomic # =
mass # =

protons =

electrons =

neutrons =

drawing of helium

Explanation:

1) Filling the subatomic particles table:

Subatomic Particle	Charge	Location in the Atom
2) Neutron	Neutral (0)	Nucleus
3) Electron	Negative ($-1$)	Electron cloud (around nucleus in shells/orbitals)

4) Electron shell capacity:

a. Step1: Recall 1st shell capacity

The 1st electron shell (or energy level) can hold a maximum of 2 electrons.

Answer:

2

b. Step1: Recall 2nd shell capacity

The 2nd electron shell can hold a maximum of 8 electrons.