If a neutral element has 8 neutrons and 7 electrons, which expression correctly identifies the element?  A.15/7 N B. 8/15 O C. 15/8 O D. 7/8 O E. None of these

Q: Estimate the amount of energy needed to remove all the electrons from the lithium atom

A: Using Bohr's formula for estimating the amount of energy needed to remove all the electrons from the…

Q: 2. Write the equation to calculate the energy levels for a hydrogen atom

A:

Q: 13. Some of the alpha particles impinged on a metal foil can pass through the foil; this indicates…

A: These are separate questions that need to be asked separately for lengthy explanations, but as they…

Q: 6. Who discovered the nucleus of the atom? A. Dalton B. Rutherford C. Millikan D. Thomson

A: Given :- Discovery of nucleus .

Q: An investigator has 0.010 μg samples of two isotopes of strontium, 89Sr (t1/2 = 51 days) and 90Sr…

A: Given: The half life of 89Sr is 51 days. The half life of 90Sr is 28 years.

Q: Physics Need Help with this I have seen an answer relating to this question but the person only…

A:

Q: The ratio of the stable Ar40 to K40 atom is found to be 10 in an old rock. All Argon atoms were…

A: Given that: Ar40K40=10Half life of K40, t1/2=1.25×109 years   (Available value)decay constant,…

Q: subjecte bi Chemists studying these elements and the periodic table predict that stable elements may…

A: From passage, element with atomic number 104 has half life of 70 s and half life decreases with…

Q: Which model of the hydrogen atom, the Bohr model orthe quantum-mechanical model, predicts that the…

A: In the Bohr's model, the electrons are placed in definite circular orbits. The electron in the…

Q: Two Plutonium atoms (atomic mass = 244) both gain 2 electrons each. Draw a FBD and calculate the net…

A: The free body diagram of the forces : The electric force is repulsive and the gravitational force is…

Q: 3. The discovery of the neutron helped people understand A. how two atoms of the same element can…

A:

Q: The liquid drop model may be used to determine the nuclear binding energy for an isotope. This model…

A: (a) Binding energy of Fe-56 isotope

Q: 1. Which of the following statements about the atomic nucleus are correct? (There may be more than…

A: about nucleus

Q: State the main interaction when an alpha particle is scattered by a gold nucleus

A: Alpha particles get scattered due to the repulsion of gold nucleus, which is positively charged.

Q: 1. Suppose a middle school class is building a simplified model of a hydrogen atom. They plan to use…

A: The diameter of the nucleus of a hydrogen atom, D = 1.75×10-15 m Diameter of nucleus, d = 2 cm Scale…

Q: The nuclear atom model put forward by Ernest Rutherfort is Rutherford's model on a thin gold plate.…

A: The nuclear atom model put forward by Ernest Rutherford model on a thin gold plate. It is based on…

Q: How many neutrons would you find in the isotope Gold-199 79 Au Gold 196.967 O 79 O 199 197 O 120

A: Write the given values with suitable variables. A=79M=199 Here, A denotes the atomic number and M…

Q: What is another way to write the isotope listed below? 239 Pu 94 Plutonium-333 Plutonium-145…

A: Definition of isopotes -  Two form of same element with different number of neutrons but same number…

Q: How does one isotope differ from the another?

A: In an isotope, the number of protons is always equal to the number of electrons, but the number of…

Q: After removing two electrons from helium atom it become? A) UV rays B) Alpha particle C) Gama…

A: There are three types of Ionizing radiation.                       1) Alpha radiation…

Q: 1) Fill in the missing information from the table below: # protons # neutrons isotope #electron- Lo…

A: The element with the atomic number (number of protons or number of electrons )17 is chlorine (Cl).

Q: Which scientist determined that electrons had predicted zones orbiting the nucleus?

A:

Q: 31. Though we would expect an increase in atomic radii going down the rare earth series of elements,…

A: Lanthanide contraction:-  Lanthanide contraction is due to poor shielding effect of electrons in 4f…

Q: 14. How many protons, neutrons and electrons are in the neutral atom of 35,„CI? A. 17 protons, 15…

A:

Q: What is atomic mass unit? Calculate the energy equivalent to 1 a.m.u in joule and electron volt.

A: Atomic mass unit is defined as mass equivalent to 1/12 th mass of an atom of Carbon-12. And…

Q: A BERYLLIUM 5.0 x 10-1 m. FIND THE EPE NUCLEUS CONTAINS FouR PROTONS SE PARATED BY STORE D IN THIS…

A: Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: Principle quantum number of a nucleus is 3. What are the possible values of the orbital quantum…

A: Given : Principle quantum number of a nucleus (n) = 3

Q: How many neutrons in the following element? 238 92 Select one: O a. 238 O b. 92 O c. 330 O d. 146

A: Given: The atomic mass of the element is 238. The atomic number is 92.

Q: What forces hold the nucleus together? And how do those forces compare in magnitude to the…

A: The nucleus of an atom is held together by the strong nuclear force. This force is the strongest…

Q: 4. A neutral atom always has A) More neutrons than protons. B) More protons than electrons. C) The…

A: Neutral atoms are the atoms which have no charge neither negative nor positive.

Q: a-particles can be scattered by thin gold foil. The diagram shows the paths of three a-particles.…

A: The alpha particles are positively charged particles with atomic mass and mass number equivalent to…

Q: Principle quantum number of a nucleus is 3. What are the possible values of the orbital quantum…

A: n is denoted as the principal quantum number which is a whole number started from 0 and ends at…

Q: Barium-137 (137 56 O a. 13 Ba Ba) undergoes gamma décay to 56 Ob.Xe O b. 133 54te Oc. 137 Cs 56 Od.…

A: gamma decay

Q: A friend suggests that nuclei are composed of equal numbers of protons and electrons, and not…

A: Tell your friend about the alpha particle scattering experiment and also tell him about the…

Q: Which of the following statements regarding the Rutherford model of the atom is correct? O The…

A: Rutherford model: On 1909, Sir Earnest Rutherford devised and performed an famous experiment called…

Q: Lithium has only two naturally occuring isotopes: lithiumi-6 and lithium-7.  Lithium-6 has a mass of…

A: Since you have asked multiple questions, we will answer the first question for you. For specific…

Q: Define and discuss the nucleus in an atom.

A: An atom has two parts, one is the central core which is called the nucleus and another one is the…

Rutherford's scattering experiment

Rutherford’s scattering experiment is also known as the gold foil experiment. This experiment disproved the plum pudding model of J.J. Thomson. In a gold foil experiment, high-energy alpha particles are made to strike a thin gold foil. The scattered alpha particles are detected using a detector. This experiment showed that the positive charge of the atom is at the center. Most of the atom’s mass is also confined to a small volume at the center. This region is known as the nucleus of the atom.