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Please help! Most elements' names end in the suffix -ium. This practice started around the year 1800, with many elements discovered before that having a more common name. However, some elements are more recently discovered and don't end in -ium. Do you notice any patterns for these elements? Brainliest is up for grabs!

Sagot :

Answer: cadmium, lanthanum, lithium, thallium, radium.

Explanation: