What is the approximate mass of an oxygen molecule, O2, if the atomic mass of oxygen is 15.9994 u?

Q: A rifle fires two 4-g bullets, one at a time, at 500-g target. The target is initially at rest and…

A:

Q: What is the Sl equivalent of 4 Ci? a. 150,000,000,000 or 1.48 X 10(12) Bq Ob.0.04 Bq Oc. 0.001032…

A:

Q: The half-life of phosphorus-32 is about 14days. There are 6.6 grams present initially.a. Express the…

A: Given, The half-life of phosphorus-32 is 14  The initial quantity is 6.6 grams

Q: 5. A 100 mg sample of radioactive iodine decays to 45 mg after 13 minutes. a. Determine the…

A:

Q: 1. The decay of radioactive substance is given by -t T N = Nᵒe (1), where N is the number of atoms…

A: You are using incorrect symbol for Tau (decay constant).

Q: a. What is the mass of technetium-99m present at 200 minutes? 115. A common isotope used in medical…

A: The given graph represents the rate of decay of Technetium-99m. Mass of the subtsance is along the y…

Q: Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at time t = 0…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

Q: 28 si + 32 s. He --> Imagine the following nuclear reaction: 14 16 MeV. Its Q-value is: Q=

A: Given nuclear reaction: 14 Si +  2He  ------------> 16S

Q: If you start with 7.0×1010I7.0×1010I-131 atoms, how many are left after approximately 1 month?…

A: In this problem, the initial amount of I-131 atoms and half-life are given and we have to find the…

Q: Radioactive element AA can decay to either element BB or element CC.The decay depends on chance, but…

A:

Q: 6. In nature, in a stable state hydrogen has two kinds of isotopes, namely 99.985% 1H with an atomic…

A: It is mentioned that there are two types of isotopes for hydrogen 1) 99.985% 1H with an atomic mass…

Q: In degenerate matter,   a. pressure depends only on the temperature.   b. temperature depends only…

A: In degenerate matter pressure depends on only the speed of the degenerate particles but not depends…

Q: RADIOACTIVITY. LAW OF RADIOACTIVE DECAY Activity units: 1 Ci = 3.7 × 1010 Bq 1. Nuclear decay law: N…

A: Given: Iodine-120 , I-120 has half life, T1/2 = 1.35 hours. = 4860 s Initial activity , A0 = 1 Ci

Q: 5. A sample of protactinium -234 of mass 100 g has a half-life of G-7 hours.. A. what praction of…

A: We have a sample of protactinium-234 having a mass m=100 g and a half life T1/2=6.7 hours. Let the…

Q: Consider the nuclear reaction: a + XY+ b. If the sum of the masses of the reactants is greater than…

A: In nuclear reactions the total mass of the reactants is greater than the total mass of the product,…

Q: Problem A You have a 5.7 mol pure sample of an unknown material. After 2 h, you discover that 44%…

A: Using the formula for decay calculation N(t)=No.e^(-λt) Where No is the initial nuber of atoms…

Atomic Number

Elements are the building blocks of all the matter that exist in the universe. Every element is made up of atoms that have protons, electrons, and a nucleus. In order to know the difference between the elements, an atomic number is used. Every element has its own individual atomic number. The atomic number is a single most important characteristic of an atom.