1. Why were the heavier elements not formed the way that the light elements were? 2. How are stars "born"?

Q: In what ways are isotopes are alike? In what ways are they different?

A: Isotopes are the atoms of same element having the same atomic number.

Q: Atoms of which element have existed for the longer period of time hydrogen sodium iron iodine

A: A question about stability of atom, which is to be accomplished.

Q: Fill in the missing information: Symbol Atomic # Mass Number # Protons # Electrons #Neutrons Charge…

A: Since, For the given notation of the element, Number of proton = Atomic number Number of neutron =…

Q: The number of electrons in the highest energy level of nitrogen is one.     two.     three.…

A: Given -> Element -> Nitrogen Electronic configuration of Nitrogen -> 1s2,2s2,2p3

Q: 4. Define an atom – 5. Label each of the parts of the atom on the diagram to the right. 6. Fill in…

A: An atom is the smallest unit of ordinary matter that forms a chemical element. Every solid, liquid,…

Q: 7. Two tanks are connected by a closed valve. Each tank is filled with gas, and both tanks are held…

A: Partial pressure of gases -:        Partial Pressure is defined as if a container filled with more…

Q: Select the INCORRECT statement. Select one: O a. All matter exhibits properties of both particles…

A:

Q: what are radioactive elements? Give examples

A: Radioactive elements:When an element is subjected to spontaneous degeneration of its nucleus…

Q: Calcium, Sulphur and selenium. Which elements can gain electrons and how many. And which ones can…

A: Calcium has 2 valence electrons and is a metal. Hence, it will give up 2 electrons.

Q: 256 116 But- The isotope above has type your answer. protons, type your answer. neutrons and type…

A:

Q: Complete the following chart, in order from left to right Mass Number Protons Neutrons Electrons Ion…

A: It has number of protons = 2, which is also equal to its atomic number. So, this is a Helium (He)…

Q: 8. Which of the following is the correct interpretation of Rutherford’s experiments in which gold…

A: The correct interpretation of Rutherford’s experiments in which gold atoms were bombarded with alpha…

Q: .What is the difference between the number of electrons in an atom of selenium, Se, and the number…

A: The number of electrons of an atom is equal to the atomic number of that atom. These are the…

Q: What are the two different notations for an element with 6 protons, 6 electrons, and 8 neutrons?

A:

Q: To the right is a representation of 50 atoms of a fictitious element called westmontium (Wt). The…

A: No. of atoms of each isotope are as follows: Wt-296 (red) 36 Wt-297 (blue) 2 Wt-298 (green)…

Q: For the 19O2- Isotope identify the number of Protons,  Neutrons,  Electrons

A: For a general element, XZA Z- atomic number = number of protons A- mass number = number of protons +…

Q: Uranium has three isotopes : uranium-233, uranium-235, and uranium-238. Compare the number of…

A:

Q: Carbon-14 is commonly used in radiometric dating to determine the age of fossils. The atomic number…

A: for a carbon-14 atom, atomic number = number of protons = 6

Q: Consider the atoms 16O, 18O, 18F, 18Ne, and 20Ne. Some of the following questions may have more than…

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

Q: Identify the element represented by each nucleus A through E as a metal, a nonmetal, or a metalloid.…

A: Given : symbol of proton and neutron

Q: Colbalt -61 is used in the medical treatment of cancer. How many neutrons and protons are contained…

A: Given, Cobalt -61 is used in the medical treatment of cancer.we are asked to determine the number of…

Q: 13. For the following elements state their Name, Period, Group #, Family Name and type of element?…

A:

Q: In 1909, a team of British scientists led by Ernest Rutherford, carried out the Gold Foil Experiment…

A: Gold Foil Experiment helped to determine the arrangement of particles in the atom.