This document provides instructions for an activity to recall atomic symbols. Students are asked to complete a table distinguishing ions from isotopes. Ions are positively or negatively charged atoms that have the same number of protons but different numbers of electrons, while isotopes are atoms of the same element that have different atomic masses. Students are then asked questions to test their understanding, such as identifying which elements presented are ions based on their charges, which are isotopes based on having the same number of protons, and the differences between three isotopes of hydrogen.

1. ACTIVITY 2. RECALLING ATOMIC SYMBOLS
Learning Competency: Write the nuclear fusion reactions that take place in stars, which lead to the formation of new elements
(S11/12PS-IIIa-3)
Specific Objectives: The students will be able to:
a. distinguish ions from isotopes
b. follow the correct format in writing an element
c. show realizations on the importance of different isotopes
I. Directions: Complete the table below.
Atomic number = p Charge= p - e
Mass number= p + n
**IONS- positively or negatively charged particles, have the same number of protons in different number of electrons. Cations are
positively charged while anions are negatively charged particles.
**ISOTOPES- refer to atoms with the same atomic number but different atomic masses.
Questions:
1. Which of the following elements are ions? How do
you say so?
2. Which of the following elements are isotopes? How
do you say so?
3. There are three isotopes of Hydrogen namely
Protium (1
H), Deuterium (2
H), and Tritium (3
H). What
is the difference of the three?
4. In the Big Bang nucleosynthesis, there were
isotopes of hydrogen formed. Encircle the isotopes of
hydrogen in this diagram: