Which of the following combinations describes the electron in the modern model ofan atom?O negative charge and located in orbitals surrounding the nucleusOpositive charge and located in orbitals surrounding the nucleusnegative charge and located in the nucleusOno charge and located in the nucleus

Atom It is a particle of matter that constitutes the nucleus and the orbits. The nucleus contains…

Answered: Which of the following combinations…

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter2: Life's Chemical Basis

Section: Chapter Questions

Problem 15SA

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A. The first shell corresponds to the first energy level, and it can hold up to 2 electrons. Hydrogen has one proton, so it has 1 electron and one vacancy. A helium atom has 2 protons, 2 electrons, and no vacancies. B. The second shell corresponds to the second energy level, and it can hold up to 8 electrons. Carbon has 6 electrons, so its first shell is full. Its second shell has 4 electrons and four vacancies. Oxygen has 8 electrons and two vacancies. Neon has 10 electrons and no vacancies. C. The third shell corresponds to the third energy level, and it can hold up to 8 electrons. A sodium atom has 11 electrons, so its first two shells are full; the third shell has one electron. Thus, sodium has seven vacancies. Chlorine has 17 electrons and one vacancy. Argon has 18 electrons and no vacancies. Figure It Out: Which of these models have unpaired electrons in their outer shell?
The “octet rule” in chemistry helps predict the types of bonds thatatoms will form. In general, an atom will be most stable if it fills itsouter shell of 8 electrons. Atoms with fewer than 4 valence electronstend to donate electrons and those with more than 4 valence electronstend to accept additional electrons; those with exactly 4 can do both.Using this rule, determine what category each of the followingelements falls into: N, S, C, P, O, H, Ca, Fe, and Mg. (You will needto work out the valence of the atoms.)
Identify the following structure H;C NH HO OH OH OH TTP ATP GTP None Clear selection
two atms of an element have the same number of protons electrons plus neutrons protons plus neutrons electrons
The triple point of an element is at 75 torr and 125°C. This means that liquid is more dense than solid cannot exist at 1 atmosphere pressure cannot have a vapor pressure less than 75 torr cannot exist above 125 degrees Celsius What is the electron geometry (or electron arrangement) around an atom in a molecule or ion which is surrounded by three lone pairs of electrons and two single bonds T-shaped see-saw trigonal planar trigonal bipyramidal linear A red blood cell placed in pure water will swell because water moves from a higer osmotic pressure to a lower osmotic pressure the osmotic pressure is greater in the cell than in the water the osmotic pressure is the same in the cell and the water the somotic pressure is greater in the water than in the cell
What is the Electron Geometry of a AB2C molecule? tetrahedral trigonal planar trigonal pyramidal bent
Why the Number of Electrons Matter Since we know each element as a defined number of protons, we can also use that number to determine the number of electrons, assuming the element has no charge. Let’s write some out: ELEMENT NUMBER OF PROTONS NUMBER OF ELECTRONS C A B O C D Al E F Na G H Si I J
While waiting at an airport, Neil Campbell once overheard this claim: "It's paranoid and ignorant to worry about industry or agriculture contaminating the environment with their chemical wastes. After all, this stuff is just made of the same atoms that were already present in our environment." Drawing on your knowledge of electron distribution, bonding, emergent properties, complete a short essay countering this argument. Match the words in the left column to the appropriate blanks in the sentences on the right. electrons electron distribution harm living organisms valence electrons charge distribution atoms basic atoms molecules electron shells interact with other molecules of each element have a characteristic number of The number of form, so the chemical reactivity of an atom arises from its emerge from the arrangement of their constituent atoms and of the bonds between them. The Thus, a wide variety of same determine its highly specific ability to Reset Help arranged in determines…
Complete the table below, using the diagram of an atom shown at right. name symbol 0 proton e Properties of subatomic particles charge (in multiples of e) 0 0 0 approximate mass (amu) (choose one) ✓ (choose one) ✓ 1.0 location on diagram (choose one) ✓ (choose one) ✓ A X A S
Magnesium has an atomic number of 12 and an atomic mass of 24. Which of the following statements is true of a neutral magnesium atom (no charge)? O It has 12 protons, 12 electron
When atoms with the same or similar electronegativities are bonded together, they pull on electrons O equally and form an ionic bond O unequally and form an ionic bond O equally and form a polar covalent bond O unequally and form a polar covalent bond O equally and form a nonpolar covalent bond O unequally and form a nonpolar covalent bond
Which of the following statements is correct regarding polar/nonpolar molecules? 1. Molecules comprised of nonpolar covalent bonds are likely to be hydrophilic 2. Polar molecules like sugar tend to dissolve in solutions of other polar molecules like water 3. Nonpolar molecules like sugar tend to dissolve in solutions of polar molecules like water 4. Polar covalent bonds tend to form between molecules that consist of two atoms of the same element, like oxygen gas (O2) or nitrogen gas (N2)

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