Question

select which statements are true and false about mendeleev and the development of the periodic table. mendeleev organized elements by atomic weight. mendeleev was the only person to develop a periodic table. mendeleev’s table was complete. mendeleev invented all the elements on the periodic table. using his table, mendeleev was able to predict elements that hadn’t been discovered yet. the periodic table was developed by nasa.

Explanation:

1. Mendeleev organizó elementos por peso atómico: Verdadero (su tabla se basó en el peso atómico).
2. Mendeleev fue el único en desarrollar la tabla periódica: Falso (otros contribuyeron, como Meyer).
3. La tabla de Mendeleev estaba completa: Falso (había espacios para elementos no descubiertos).
4. Mendeleev inventó todos los elementos: Falso (los elementos existen en la naturaleza o se crean, no se inventan).
5. Predijo elementos no descubiertos: Verdadero (usó su tabla para predecir propiedades de elementos desconocidos).
6. Desarrollada por NASA: Falso (NASA no existía entonces, la tabla es de Mendeleev y otros).

Answer:

• Mendeleev organized elements by atomic weight: True
• Mendeleev was the only person to develop a periodic table: False
• Mendeleev’s table was complete: False
• Mendeleev invented all the elements on the Periodic Table: False
• Using his table, Mendeleev was able to predict elements that hadn’t been discovered yet: True
• The Periodic Table was developed by NASA: False