APEMAN chemistry
Summary
TLDRThe video script introduces the 'APEman' strategy for calculating subatomic particles in an atom, focusing on lithium as an example. APEman stands for Atomic Number, Protons, Electrons, Mass Number, Atomic Number, and Neutrons. It explains that for a neutral atom like lithium, the atomic number equals the number of protons and electrons. The mass number is the rounded atomic mass, which is the sum of protons and neutrons. The script demonstrates how to find the number of neutrons by subtracting the atomic number from the mass number, completing the APEman calculation.
Takeaways
- π¬ The '8-man' strategy helps determine the number of subatomic particles in an atom.
- π§ͺ Subatomic particles include protons, neutrons, and electrons, which are smaller than atoms.
- βοΈ APE in '8-man' stands for Atomic number, Protons, and Electrons, and they all have the same number.
- π The mass number is the atomic mass rounded to a whole number.
- π The mass number is determined by adding the number of protons and neutrons together.
- π’ To find the number of neutrons, subtract the atomic number from the mass number.
- π In a neutral atom, the number of protons equals the number of electrons.
- 𧩠Protons define the element itself; for example, only lithium has 3 protons.
- π The mass number is found at the bottom of the element's box on the periodic table and is often displayed as a decimal.
- π‘ Using the example of lithium: it has 3 protons, 3 electrons, a mass number of 7, and 4 neutrons.
Q & A
What is the APEMEN strategy used for?
-APEMEN is a strategy used to determine the number of subatomic particles in an atom.
What are the three main subatomic particles found in an atom?
-The three main subatomic particles found in an atom are protons, neutrons, and electrons.
What does APEMEN stand for in the context of atomic structure?
-APEMEN stands for Atomic Number, Protons, Electrons, Mass Number, Atomic Number, and Neutrons.
Why are the atomic number (A), protons (P), and electrons (E) all the same number in a neutral atom?
-In a neutral atom, the atomic number (A), protons (P), and electrons (E) are the same number because the positive charge of protons is balanced by the negative charge of electrons, resulting in no net charge.
How is the mass number (M) of an atom determined?
-The mass number (M) of an atom is determined by rounding the atomic mass to the nearest whole number.
What is the significance of the atomic number in defining an element?
-The atomic number is significant in defining an element because it represents the number of protons in the nucleus, which is unique to each element.
How do you find the number of neutrons (N) using the APEMEN strategy?
-You find the number of neutrons (N) by subtracting the atomic number (A) from the mass number (M), since the mass number represents the sum of protons and neutrons.
Why is the atomic mass rounded to a whole number in the APEMEN strategy?
-The atomic mass is rounded to a whole number in the APEMEN strategy to simplify calculations and because the mass number represents the sum of protons and neutrons, which are whole numbers.
Can you provide an example of how to use the APEMEN strategy with an element from the periodic table?
-Yes, for lithium, the atomic number (A) is 3, which is also the number of protons (P) and electrons (E). The atomic mass is approximately 6.94, which rounds up to a mass number (M) of 7. Subtracting the atomic number from the mass number gives us 4 neutrons (N).
What is the role of the mass number in the APEMEN strategy?
-In the APEMEN strategy, the mass number represents the sum of protons and neutrons in the nucleus of an atom and is used to calculate the number of neutrons.
Outlines
π¬ Understanding Subatomic Particles with the APEMAN Strategy
This paragraph introduces the APEMAN strategy, a method used to determine the number of subatomic particles within an atom. The strategy involves understanding the atomic number, protons, electrons, mass number, and neutrons. The atomic number (A), protons (P), and electrons (E) are all the same for a neutral atom, while the mass number (M) is the rounded atomic mass. The atomic number is reiterated (A), and neutrons (N) are calculated by subtracting the atomic number from the mass number. The example of lithium is used to illustrate the process, showing that lithium has three protons, three electrons, and a mass number of 7 after rounding. The number of neutrons is calculated as 4 by subtracting the atomic number from the mass number.
Mindmap
Keywords
π‘Subatomic Particles
π‘Protons
π‘Neutrons
π‘Electrons
π‘Atomic Number
π‘Mass Number
π‘APEMAN
π‘Rounded Atomic Mass
π‘Neutral Atom
π‘Periodic Table
π‘Charge
Highlights
Introduction to the APEMANT strategy for determining subatomic particles in an atom.
Explanation of subatomic particles: protons, neutrons, and electrons.
APEMANT stands for Atomic Number, Protons, Electrons, Mass Number, Atomic Number, and Neutrons.
Atomic Number (A), Protons (P), and Electrons (E) are all the same number in a neutral atom.
Mass Number (M) is the rounded atomic mass, typically to the nearest whole number.
Atomic Number is repeated in the strategy to emphasize its importance.
Neutrons (N) are calculated by subtracting the atomic number from the mass number.
Example using Lithium from the periodic table to demonstrate the APEMANT strategy.
Lithium has an atomic number of 3, which is also the number of protons and electrons.
The mass number of Lithium is approximately 6.94, rounded to 7 for the APEMANT calculation.
The mass number is the sum of protons and neutrons in an atom.
The number of neutrons in Lithium is calculated to be 4 using the APEMANT strategy.
APEMANT strategy can be applied to any element on the periodic table to find subatomic particles.
Emphasis on the atomic number as the defining characteristic of an element.
The importance of a neutral atom having an equal number of protons and electrons.
The rounding of the atomic mass to a whole number for the APEMANT calculation.
The relationship between the mass number and the number of protons and neutrons.
The practical application of the APEMANT strategy for educational purposes.
Transcripts
all right hey guys we're going to go
over
a strategy called apeman which is how we
can determine how many subatomic
particles are in an atom
remember your subatomic particles are
the ones smaller than an atom so your
protons neutrons and electrons
so eight man
again is how we're going to calculate
our subatomic particles
eight man stands for atomic number
protons electrons mass number
atomic number and neutrons again
so a p and e atomic number protons and
electrons will all be the same number
i'll show that to you in a second
mass number is going to be the rounded
atomic mass
a is the atomic number again and n is
the number of neutrons
when i say rounded atomic mass
it is the mass number just rounded to a
whole number instead of a decimal
so again if you want to write those down
a is atomic number p is number of
protons e is number of electrons
m is mass number rounded to a whole
number
a is the atomic number again and n is
the number of neutrons
so we're going to look at lithium
specifically this is its
block on the periodic table
so a p and e again are all the same
number it is going to be the smaller
whole number in the box so for lithium
it is three
three is the atomic number
it is how many protons lithium has
and in a neutral atom meaning it has no
charge it's the number of electrons
think about the charge of protons it's
positive and electrons is negative if we
have a neutral atom
there is the same number of positive and
negative charges
so a p and e are all the same number
also keep in mind the number of protons
is what makes an element an element
only lithium will have three protons
if an atom does not have three protons
it's not lithium
moving on to the mass number
um the mass is shown
at the bottom
of
an element's block on the periodic table
in most cases you're going to see it as
a decimal for the mass number we're
going to round it to a whole number
so in this case
6.94
if we're rounding we're going to round
up because of that 0.94 so our mass
number here
is going to be 7.
and just so that you know our mass
number is made
or determined by the number of protons
plus the number of neutrons
and we knew already that those number of
protons in lithium is
and our mass number rounded is going to
be seven
now we've gone through eighth and the
next m
a in man is just the atomic number once
again
so we'll put three there again for ape
man
moving on to the last
part of our eight man calculation we're
going to neutrons
we can find the number of neutrons by
subtracting the atomic mass
and the atomic number
remember the mass number
is the number of protons and neutrons
together
the atomic number
is the number of protons so if we
subtract
our protons away from the atomic mass we
get our neutrons so in this case
we have our atomic mass was seven
minus our number of protons was three
so we should get our number of neutrons
being 4.
so you have now walked through an entire
8-man calculation
we can use an elements box on the
periodic table again we looked at
lithium right now
three protons
three electrons its mass number
is going to be seven because we rounded
six point nine up to seven
and you can use eight man again to
calculate
the number of subatomic particles in any
atom
Browse More Related Video
Atomic structure of Lithium/ 3D Animation /Class 11 chemistry/ Lithium atom/ class 9
Chemistry Lecture 1 - Atoms
Electron Configuration of First 20 Elements | Properties of Matter | Chemistry | FuseSchool
Atomic Number & Mass Number | Properties of Matter | Chemistry | FuseSchool
Grade 8 Science Q3: Determining the number of protons, neutrons, and electrons in a particular atom
Atomic Number, Mass Number, and Net Charge
5.0 / 5 (0 votes)