Ask Question
ChemistryChemistry
5 February, 04:41

What element has 81 protons in the nuclei of its atoms?

A. Platinum

B. Lead

C. Uranium

D. Thallium

+5
Answers (2)
  1. 5 February, 06:12
    0
    The question asks us to choose the element which has 81 protons in the nuclei of its atoms. We can use Periodic system of elements. There we can see that TL is an element with the atomic number 81. Thallium (Tl) is a toxic metal. it has : 81 electrons, 81 protons and 123 Neutrons. Answer: D. Thallium.
  2. 5 February, 06:38
    0
    The element that contains 81 protons in the nuclei is Thallium. The answer to this item is letter D. The number of protons in the nuclei of the remaining choices are 78, 82, and 92 for Platinum, Lead, and Uranium, respectively. If an atom is neutral, this means that the number of proton is equal to the number of electrons.
Know the Answer?
Not Sure About the Answer?
Get an answer to your question ✅ “What element has 81 protons in the nuclei of its atoms? A. Platinum B. Lead C. Uranium D. Thallium ...” 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
Complete the sentence. The lower the hydrogen ion concentration, the __ the pH. A) higher B) lower C) closer to 7 D) closer to 0
Answers (1)
2. 2AgNO3 + CaCl2 → 2AgCl + Ca (NO3) 2 How much AgCl could be obtained starting with 100g of each reactant.
Answers (1)
Why do you think elements must be heated before they emit colored light?
Answers (1)
Why is it called a compound microscop
Answers (1)
If there are 14 chromosomes in pea plant cells, how many chromosomes are present in a sex cell of a pea plant?
Answers (2)
New Questions in Chemistry
When in a compound, the oxidation number of a nonmetal: A). is always fixed and can never be changed B). can only be deduced once all the other oxidation numbers in the equation are totaled C).
Answers (1)
Which of the following actions will not increase the rate at which a solid dissolves in a liquid? A. increasing the surface area of a solid B. stirring the solid and the liquid C. increasing the amount of the solid D.
Answers (1)
Does the amount of heat absorbed as 1 kg of saturated liquid water boils at 100°C have to be equal to the amount of heat released as 1 kg of saturated water vapor condenses at 100°C?
Answers (1)
F. Protection of the body from infectious organisms is accomplished by which of these tissues? a) bone; b) muscle; c) nerve; d) blood
Answers (1)
A compound that is composed of molybdenum (Mo) and oxygen (O) was produced in a lab by heating molybdenum over a Bunsen burner. The following data was collected: Mass of crucible: 38.26 g Mass of crucible and molybdenum: 39.
Answers (2)
Home » Chemistry » What element has 81 protons in the nuclei of its atoms? A. Platinum B. Lead C. Uranium D. Thallium
Sign Up Forgot Password?