Physical Science

1. Which equation correctly shows beta decay?
(A) 210/82 Pb -> 209/81 Tl + 0/-1 e + y
(B) 210/82 Pb -> 209/83 Bi + 0/-1 e + y
(C) 210/82 Pb -> 210/83 Tl + 0/-1 e + y
(D) 210/82 Pb -> 210/83 Bi + y
(E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y

2. The half-life if radon-222 is 3.8 days. If a sample currently has 3.1 grams of radon-222, how much radon-222 did this sample have 15.2 days ago?

(A) 12.4 grams
(B) 47.1 grams
(C) 49.6 grams
(D) 57.8 grams
(E) 92.7 grams

The two questions that I can't figure out on my Science homework. Please help!

  1. 👍
  2. 👎
  3. 👁
  1. (E) 210/82 Pb -> 210/83 Bi + 0/-1 e + y
    (C) 49.6 grams

    1. 👍
    2. 👎
  2. (E) 210/82Pb-> 210/83Bi + 0/-1e +Y
    (A) 12.4 grams

    1. 👍
    2. 👎
  3. djikopp[

    1. 👍
    2. 👎

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    Use the equation to answer the prompt. 10 6C→10 5B+ 0+1e A student claims that the equation models beta-minus decay because the atomic number of the nucleus decreases by one. In one or two sentences, explain the error in the

  2. Physics

    Radioactive Decay Energy Quick Check Polonium has a large, unstable nucleus. Through which process is it most likely to become stable? gamma decay beta-plus decay beta-minus decay alpha decay(✔️) Which type of energy does

  3. Physical science

    A student claims that the equation models beta minus decay because the atomic number of the nucleus decreases by one and 1 to 2 sentences explain the error in the students reasoning 10/6C—>10/5B + 0/+1e

  4. maths

    if alpha and beta are the zeros of the polynomial 2x^2-4x+5 then find the values of (i)alpha^2+beta^2 (ii)1/alpha^2+1/beta^2 (iii)(r)alpha/beta+(r)beta/alpha (iv)alpha^-1+beta^-1

  1. science

    14 6C→14 7N+ 0−1e Which type of radioactive decay does the equation model? gamma decay beta-plus decay beta-minus decay alpha decay

  2. Physical Science

    A student claims that the equation models beta-minus decay because the atomic number of the nucleus decreases by one. In one or two sentences, explain the error in the student's reasoning. 10/6 C -> 10/5 B + 0/+1 e

  3. Science-please check

    1. Isotopes with an unstable nucleus are radioactive *** are extremely rare change into radioisotopes are only found in elements with many protons 2. When Lr-256 undergoes alpha decay, it becomes Es-252 Md-252 *** [Explanation: Lr

  4. trig

    verify the identity: sec(beta)+ tan (beta)= cos(beta)/ 1-sin(beta)

  1. Trigonometry

    Prove that tan (Beta) sin (Beta) + cos (Beta) = sec (Beta) Please explain.

  2. physics

    when polonium-210 undergoes alpha decay, lead-206 is produced. What is the same and different between the two elements?

  3. Chem

    Write a balanced equation for: 1. beta decay of iodine-138 2. capture of an electron by cadmium-104

  4. Chemistry

    Cobalt-60, which undergoes beta decay, has a half-life of 5.26 yr. How many beta particles are emitted in 190s by a 3.10mg sample of Co-60? What is the activity of the sample in Bq?

You can view more similar questions or ask a new question.