Science

posted by .

Before 1937, all naturally occuring elements had been discovered, but no one had found any trace of element 43. Chemists were still able to predict the chemical properties of this element (now called technetium), which is widely used today for diagtnosing medical problems. How were these predictions possible? Which elements would you expect to be similar to technetium?

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Science. plz help!!

    What is the physical and chemical characteristics of the element neon?
  2. Chemistry

    When scientist first negan grouping element that had similar chemical properties did they call them families, triads, or clusters Newland called them triads, in 1864. But I am not certain at the time he knew what he had discovered, …
  3. Ununhexium/atoms

    I don't understand, according to the periodic table at web elements; An isotope of Element 116 (292Uuh) was identified in the reaction of 248Cm with 48Ca. It is very shortlived and decomposes to a known isotope of element 114, 288114Uuq. …
  4. Science

    Why certain elements bond well while others do not?
  5. physical science

    Before 1937, all naturally occurring elements had been discovered, but no one had found any trace of element 43. Chemists were still able to predict the chemical properties of this element (now called technetium), which is widely used …
  6. Chemistry (The Composition of an Atom)

    In 1808, John Dalton wrote his atomic theory of matter. The following is a list of points from that theory. If it is still considered true today, label it true. If it is not considered true today, label it false. 1)Atoms cannot be …
  7. Chemistry please help

    State Dalton’s Postulates? In light of modern knowledge, what are the inaccuracies in Dalton’s Postulates?
  8. Chemistry

    ONe day, you were walking along the road with your friend and saw a piece of solid that you've never seen before. You were curious about the identity of the substance so you tried to give it to the Department of Science. You found …
  9. science

    before 1937, all naturally occurring elements had been discovered except element 43. chemists predicted the chemical properties of this element, now called technetium. how were those predictions possible?
  10. Chemestry

    A new element has been discovered and you are on the task force to determine where this new element will be placed on the periodic table with its known properties. Using the model of the periodic table and its periodic patterns, analyze …

More Similar Questions