Ask Question
ChemistryChemistry
15 August, 21:38

There are two kinds of elements that didn't appear on the periodic table until after 1892. What kinds are they and why do you think it took so long to discover them?

+5
Answers (1)
  1. 16 August, 00:34
    0
    Your Question: There are two kinds of elements that didn't appear on the periodic table until after 1892. What kinds are they and why do you think it took so long to discover them?

    The Answer: Moseley's analysis enabled chemists to refine the table further and reveal more gaps, which suggested that there were more new elements waiting to be discovered, with atomic numbers 43, 61, 72 and 75. Scientists subsequently found these elements-now known as technetium, promethium, hafnium and rhenium, respectively.

    Explanation: Physicist Henry Moseley discovered the atomic number of each element using x-rays, which led to more accurate organization of the periodic table. We will cover his life and discovery of the relationship between atomic number and x-ray frequency, known as Moseley's Law.

    Remember to read study guides, lessons and notes to rely yourself on; key to success is working hard. Good Luck!
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “There are two kinds of elements that didn't appear on the periodic table until after 1892. What kinds are they and why do you think it took ...” in 📙 Chemistry if there is no answer or all answers are wrong, use a search bar and try to find the answer among similar questions.
Search for Other Answers
You Might be Interested in
The Law of states that if two elements can combine to form two different compounds, the masses of the one element that can combine with a fixed amount of the other element will be in a ratio of small whole numbers.
Answers (2)
A glycosidic bond is (A) a bond between any two carbohydrate molecules. (B) a bond formed between an anomeric carbon atom and any - OR group. (C) a bond between anomeric carbon atoms on two separate monosaccharides.
Answers (1)
Which category would encompass occupational sex segregation? A. Institutional racism B. Stereotyping C. Assimilation D. Prejudice
Answers (2)
Determine the gram formula mass of the product
Answers (1)
A researcher dispenses distilled deionized water from a 20-ml volumetric pipet into an empty 8.4376 g weighting bottle. If the total mass of water and weighting bottle is 28.
Answers (1)
New Questions in Chemistry
Which of the following characteristics is not a property of an acid? a. has a sour taste b. accepts an H + ion c. may cause damage to buildings, statues, and rivers d. increases the concentration of hydronium ions in an aqueous solution
Answers (1)
Which of these conclusions can be drawn from Rutherford's experiment? A: Each atom contains electrons. B: The nucleus of an atom can be split. C: Each atom contains protons. D: Atoms are mostly empty space.
Answers (1)
Describe one major laboratory accident mentioned in the training presentation, what chemicals were involved, the type of PPE that was worn at the time of the accident, and how it could have been prevented.
Answers (1)
Which process creates food for plants in order to maintain homeostasis? Breathing Cell division Cellular respiration Photosynthesis
Answers (2)
Describe a proton, neutron, and electron. Where are these particles located inside an atom.
Answers (2)
Home » Chemistry » There are two kinds of elements that didn't appear on the periodic table until after 1892. What kinds are they and why do you think it took so long to discover them?
Sign Up Forgot Password?