Refer to the masses of the subatomic particles in Table 2. Arrange the subatomic particles in increasing mass. Which subatomic particle is the lightest? Which subatomic particle is the heaviest? Which subatomic particles have almost the same mass?
Refer to the masses of the subatomic particles in Table 2. Arrange the subatomic particles in increasing mass. Which subatomic particle is the lightest? Which subatomic particle is the heaviest? Which subatomic particles have almost the same mass?
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Transcribed Image Text:2.
3.
4.
Show a comparison of the masses of the three subatomic particles using a bar
graph. Refer to Figure 2 in the next page, assuming that the first bar represents
the mass of the proton; draw the bars to represent the masses of the neutron
and the electron. Take note that the masses are expressed in the -28
exponent.
This time, using a pie chart, show the proportion of the masses of the
subatomic particles for an atom composed of only 1 proton, 1 neutron and 1
electron.
A seesaw can show a comparison between two masses of an
object. A seesaw goes up and down depending on the
mass it carries on each side.
Q4. How does the mass of the neutron compare
with the mass of the proton? Using circles to
represent the particles show the comparison
by drawing a seesaw with the particles on it.
5.
Q5. How many electrons should be placed on one side of the seesaw to balance it
if the other side has 1 proton on it, like the one shown below? Write the number
on the space provided in the illustration below.
e
1p+
Take a look again at the different visual representations you have made.
Q6. Which subatomic particle/s make/s up most of the mass of the atom?
V
In the activity above, you have visually compared the masses of the three
subatomic particles. You have "seen" that protons and neutrons are "massive
indeed". Electrons are very much lighter than the protons and neutrons, to the
point that its mass does not significantly contribute to the mass of the entire atom.
In effect, the mass of the electron is negligible.
The massive part of the atom, then, comes from the masses of the protons
and neutrons. Collectively, the protons and neutrons are called nucleons. The
nucleons, tightly packed together, form the nucleus in the center of the atom.
Thus, most of the mass of the atom is contained in its nucleus. In the succeeding
activities, you will learn more about the nucleus and how it was discovered.
Transcribed Image Text:Table 2. Some properties of the three main subatomic particles
Subatomic
particle (symbol)
Electrons (e)
Protons (p*)
Neutrons (nº)
Objectives:
Charge
-1
1.
+1
Activity 2
The big difference
0
pencil/pen
De crayons or colored pencils
Mass, grams
9.109 x 10-28
1.672 x 10-24
1.675 x 10-24
Location in the Atom
Outside nucleus
Nucleus
After performing this activity, you should be able to:
1. compare the masses of the subatomic particles using different ways of
visual representation
2. infer which subatomic particle contributes to the mass of the atom
Materials Needed:
Nucleus
Procedure:
Refer to the masses of the subatomic particles in Table 2. Arrange the
subatomic particles in increasing mass.
Q1. Which subatomic particle is the lightest?
Q2. Which subatomic particle is the heaviest?
Q3. Which subatomic particles have almost the same mass?
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