Why are the lanthanoid elements not found in nature in their elemental forms?

Which of these best describes an ionic bond?

56.16 gregor mendel was the first scientist to use statistics to analyze scientific data. before mendel's experiments, scientists believed that organisms acquired traits from their environment and passed them on to their offspring. after mendel's discoveries were accepted, scientists realized that traits passed to offspring were the result of genes being passed from parents to offspring. this is an example of pls

Stage in which a star’s outer layers have started to cool and grow outward?