(c) Although the normal trend is for the ionization energy to increase going to the right in a period, aluminum has a lowered ionization energy and magnesium has a raised ionization energy due to the electron configurations of these two ionizations. This reverses the order of ionization energies.…
23. As changes in energy levels of electrons increase, the frequencies of atomic line spectra they emit increase or…
A) Isotopes of the same element differ only in the number of electrons they contain.…
In the graph that I have made in Part 2, the graph seemed to go up. So, this means that as the periodic number increases, so does the element’s atomic radius.…
Atomic number is derived from the number of protons in an atom. Example, Helium, (H) = 1. The number of protons in an element is constant (e.g., H=1, Ur=92) but neutron number may vary, so mass number (protons + neutrons) may vary. However, the same element may contain varying numbers of neutrons; these forms of an element are called isotopes. The chemical properties of isotopes are the same, although the physical properties of some isotopes may be different. Some isotopes are radioactive-meaning they "radiate" energy as they decay to a more stable form, perhaps another element half-life: time required for half of the atoms of an element to decay into stable form. Another example is oxygen; with atomic number of 8 can have 8, 9, or 10 neutrons.…
1. What is an ion? 2. What does the number next to the ions signify?…
3. How many protons do the following have? 4. How many electrons do the following have? Calcium have____ Gold have____ Gold_______ Iron_____ Copper______ Copper_____ Iron______ Uranium_____ 5. Does mercury have more protons and electrons than tin? 6. Is mercury a heavier element than tin? 7. Does potassium have more electrons than neon? 8. Does hydrogen have more electrons than Uranium? 9. Which has more protons, sulfur or iodine? 10. Which has more protons, iodine or silver? 11. In the boxes below make Bohr models for each of the elements. a. Determine how many electrons, protons, and neutrons there are in each atom. b. Draw a Bohr model of each element using the number of electrons, protons, and neutrons c. NOTE: The first energy level can only hold up to 2 electrons. The second energy level can hold up to 8 electrons.…
5. The number of protons in one atom of an element determines the atom’s _____________, and the number of electrons determines the ________________ of the element. 6. The atomic number tells you the number of ____________ in one atom of an element. It also tells you the number of ____________ in a neutral atom of that element. The atomic number gives the “identity” of an element as well as its location on the periodic table. 7. No two different elements will have the ____________________. What is a valence electron? _____________________________________…
Introduction: According to the Bohr atomic model, electrons orbit the nucleus in fixed paths with specific energies. Each path is therefore often referred to as an “energy level”. Electrons possessing the lowest energy are found in the levels closest to the nucleus. Electrons of higher energy are located in progressively more distant energy levels.…
1. ____ According to the wave-mechanical model of the atom, electrons in an atom (1) travel in defined circles (3) have a positive charge (2) are most likely found in an excited state (4) are located in orbitals outside the nucleus 2. ____ What is the total charge of the nucleus of a carbon atom? (1) –6 (2) 0 (3) +6 (4) +12 3. ____ When an atom loses one or more electrons, this atom becomes a (1) positive ion with a radius smaller than the radius of this atom (2) positive ion with a radius larger than the radius of this atom (3) negative ion with a radius smaller than the radius of this atom (4) negative ion with a radius larger than the radius of this atom 4. ____ Which electron configuration could represent a strontium atom in an excited state? (1) 2–8–18–7–1 (3) 2–8–18–8–1 (2) 2–8–18–7–3 (4) 2–8–18–8–2 5. ____ Which grouping of circles, when considered in order from the top to the bottom, best represents the relative size of the atoms of Li, Na, K, and Rb, respectively? 6. ____ What is the total number of neutrons in an atom of (1) 26 (2) 31 (3) 57…
The Atomic Theory of Matter 2.2 The Discovery of Atomic Structure Cathode Rays and Electrons Radioactivity The Nuclear Atom 2.3 The Modern View of Atomic Structure Atomic Numbers, Mass Numbers, and Isotopes 2.4 Atomic Weights The Atomic…
The purpose of this lab was to analyze the trends of the atomic radius (AR) and the first ionization energy (IE) for the first 36 elements of the periodic table.…
This is the culmination of the work of 5 eminent physicists, Dalton, Thomson, Rutherford, Bohr and Chadwick.Their work basically culminates in the ideas above and the important fact that an atom consists of:A nucleus containing protons and neutrons surrounded byElectrons in orbital around the nucleus.3. Atomic Number = Number of Protons4. Atomic Mass = Protons + Neutrons 5. Atomic Mass – Protons = Neutrons 6. Atomic Number – Atomic mass = Neutrons7.Protons = Electrons8. Valence electrons are electrons on outermost shell of an atom.5. Ionic bonds happen by transfer of electrons from one atom to another, usually between metals and nonmetalsHalite = NaCl Na…
Explain why you think this book will or will not be read 100 years from now. Support your opinion by stating specific events in the story.…
The passion one has for something can make those who have never related to it have a desire to understand it in order to experience the same passion.…