Comprensión de conceptos 1. ¿Cuál es la ley periódica actual? ¿Qué la distingue de la ley periódica de Mendeleiev?
2. ¿Cuáles son los dos factores que contribuyeron para que la tabla periódica de Mendeleev se aceptara por
completo?
3. ¿Cuáles de las tríadas de Döbereiner que aquí se muestran
Triada 1 Triada 2 Triada 3
permanecen aún en la misma columna en la tabla periódica
moderna?
Na
Cr
Se
K
Fe

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Put the following processes of protein synthesis in the correct order: - dna strands unwind and separate - mrna copies dna according to complimentary base pairing - trna's anticodons bring amino acids to the corresponding mrna codons - amino acids bind to each other making a protein - mrna leaves the nucleus - a stop codon is reached, the newly formed protein is released to go do its job for the cell

Which chemical equation is unbalanced? which chemical equation is unbalanced