This document provides information about atoms, ions, molecules and the periodic table of elements. It includes questions about writing electronic structures of elements, the number of protons in fluorine, how a sodium ion is formed from a sodium atom, the type of bonding in a water molecule and which group oxygen belongs to in the periodic table. Additional questions cover reactivity of metals, the structure of helium atoms, identifying missing particles in diagrams of atoms, and determining properties like electronic structure and whether an element is a metal or non-metal based on its composition.

1. TUTORIAL
SCIENCE
ATOMS, IONS,
MOLECHULES

2. Look at the diagram of part of the Periodic table of the elements.
A. Use the Periodic table to write the electronic structure of aluminium (Al),
oxygen (O), and calcium (Ca)
B. How many of protons are in an atoms of fluorine (F)?
C. A Sodium atom (Na), forms a sodium ions (Na+).
Describe in terms of electrons, how a sodium ions is made from a sodium
atom)
1

3. ANSWER
A. We can count the atomic mass of the
elements start from hydrogen. So the
atomic mass of :
B. Based on the periodic table, the protons of Flourine (F) is 9. Because the number of
protons same with the number of atomic mass. Atomic mass can we get by counting orderly
from H until F.
 Aluminium is 13. The electronic structure
is 2)8)3).
 Oxygen is 8. The electronic structure is
2)6).
 Calcium is 20. The electronic structure is
2)8)8)2).
C. It can be happened if sodium atom losses an electron or because of electrons lost.

6. Look at the diagram of a water molechule, H2O.
A. State the type of bonding in a water
molechule.
________________________________
Review the reason
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B. If the atomic NUMBER of oxygen is 8,
review which group in periodic table
oxygen belong by choosing the
following true number.
a. 8, because the group is based on
the atomic mass.
b. 2, because the atomic structure is
2)6) so the group is from the inner
layer.
c. 6, because the atomic structure is
2)6) so the group from the outer
layer.
d. 6, because group is from the
atomic mass substract by 2.

7. DISCUSS WITH YOUR SEATMATE

8. The diagram shows the group of the Periodic Table that contains helium.
The elements are in the same order as they appear in the Periodic Table.
Elements Atomic
structures
Helium 1 A 2)8)18)8)
Neon 2 B 2)
Argon 3 C 2)18)8
Krypton 4 D 2)8)
G 2)8)8)
a. Connect the name of elements with the atomic structures.
b. Review how the radius of the atom change as you go down the group.

9. DISCUSS WITH OTHER GROUP

10. The chart shows part of the reactivity series of metals.
a. Magnesium reacts with oxygen
to make magnesium oxide. Write
the word equation for this
reaction.
b. If sodium and gold react with oxygen,
conclude how the reaction by
choosing the following statements.
A. The result are sodium oxide and
gold oxide.
B. The reaction between sodium with
oxygen will stronger than gold with
oxygen.
C. Sodium is most reactive, so it can
not react with oxygen.
D. The sodium is the most reactive so
it can react with oxygen. But gold
is unreactive so it can not react
with oxygen.

12. The diagram shows part of the structure of an atom of helium.
There are three types of particle in an atom. This diagram shows only two of the
types of particle.
a. Name the particles labelled Z.
b. Name the particles that are missing from the diagram.
c. Draw on the diagram the correct position and number of the missing
particles.

14. The table shows the
structure of different atoms
and ions.
What are the values of
W, X, Z?
Particle Proton
number
Nucleo
n
number
Numbe
r of
protons
Numbe
r of
neutro
ns
Numbe
r of
electro
ns
Mg 12 24 12 W 12
Mg2+ X 24 12 12 10
F 9 19 9 Y 9
F- 9 19 9 10 Z
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W X Y Z
A 10 10 9 9
B 10 12 10 9
C 12 10 9 10
D 12 12 10 10

15. The table gives the composition of three particles.
Review the evidence in the table for each of the following?
a. What is the electronic structure of particle A?
b. What is the valency of the element?
c. Is the element a metal or a non-metal? Give a reason for your choice.
Particle Number of
Protons
Number of
electrons
Number of
Neutrons
A 15 15 16
B 15 18 16
C 15 15 17
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16. THANKS FOR
WATCHING AND
LEARNING