¿Qué son los elementos? ¿Y por qué usamos la tabla periódica?

The video explores the transition from ancient beliefs about elements to modern scientific understanding. It covers the role of alchemists, the discovery of real elements, and the development of the periodic table. The structure and properties of elements are explained, along with their formation in the universe. The video highlights the periodic table's significance in understanding matter and the ongoing quest to discover new elements.

What was the ancient belief about the origin of all matter?

• Stars and galaxies

• Earth, fire, air, and water

• Atoms and molecules

• Protons, neutrons, and electrons

Who were instrumental in discovering the real elements?

• Alchemists

• Astronomers

• Physicists

• Biologists

What determines the difference between elements?

• Number of atoms

• Number of electrons

• Number of protons

• Number of neutrons

How many types of atoms are known?

• 150

• 118

• 100

• 93

Who arranged the elements by atomic weight and predicted unknown elements?

• Albert Einstein

• John Dalton

• Dmitry Mendeleev

• Isaac Newton

What does the periodic table's rows or periods indicate?

• Number of protons

• Number of neutrons

• Number of energy levels

• Number of electrons

What makes elements in the last column of the periodic table stable?

• Having 1 electron in the last shell

• Having 8 electrons in the last shell

• Having no electrons in the last shell

• Having 4 electrons in the last shell

How were the first atoms formed after the Big Bang?

• Through cosmic rays

• In the center of stars

• When the universe cooled

• In particle accelerators

What process is required to form elements like gallium and bromine?

• Supernova

• Cosmic ray collision

• Nuclear fusion

• Big Bang

Where are elements from 94 to 118 typically created?

• In nature

• In stars

• In the ocean

• In particle accelerators