Atoms are the building blocks of matter - they make up all living and nonliving things! The periodic table is a chart of all the known elements, organized according to their properties. Atoms can combine to form molecules - the basic units of many chemical substances!
Atoms and the Periodic Table
Atom: The smallest particle of an element that still retains the properties of that element. Periodic Table: A chart of all the known elements arranged in order of their atomic number, which helps to show the similarities between elements.
Concepts:
What are the main components of an atom?
How can the periodic table be used to classify elements?
What patterns can you observe in the periodic table?
What do you think is the importance of understanding the structure of atoms?
Brain break: Draw a dinosaur juggling fruits in one hand and a pizza in the other hand
Question: Why is the periodic table arranged in the way it is? Clues: • Atoms are made up of protons, neutrons and electrons. • The number of protons in an atom determines its atomic number. In pairs: Select and solve one of the tasks: A. Explain how the arrangement of the periodic table reflects the structure of atoms. B. Create a drawing of the periodic table to illustrate its arrangement.
What is the smallest unit of matter that retains the properties of an element?
Which subatomic particle has a positive charge?
Neutrons have
- Mass but no electric charge
- Neither mass nor electric charge
- Mass and electric charge
Electrons have
- Important mass and electric charge
- Neither mass nor electric charge
- Electric charge and almost no mass
What is the atomic number of an element?
- Number of neutrons in its nucleus
- Number of protons in its nucleus
- Number of electrons in its outer shell
What is the mass number of an element?
- Number of neutrons in its nucleus
- Number of protons and electrons in its nucleus
- Number of protons and neutrons in its nucleus
Which element has the symbol 'He' on the periodic table?
Which element has the symbol 'Si' on the periodic table?
What is the smallest unit of an element that retains its chemical properties?
Which subatomic particle has a negative charge?
What is the net charge of an atom with 10 protons, 8 neutrons, and 12 electrons?
An atom with 7 protons, 8 neutrons, and 7 electrons is:
- a neutral atom
- a negative ion
- a positive ion
What is the atomic number of hydrogen?
How many elements are there in the periodic table as of now?
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