Which scientist tested a theory of atomic structure using alpha particles and a sheet of gold foil?

Ernest Rutherford in 1911. More test answers on https://studyhippo.com/chemistry-final-6469/

How did the idea about atomic structure begin?

Democritus – believes all matter was made from atomos More test answers on https://studyhippo.com/physics-topic-4-atomic-structure-2/

Minerals must be solid, have an orderly atomic structure, have a recognized chemical composition, be naturally occurring, and __________.

be generally inorganic in origin More test answers on https://studyhippo.com/mastering-geology-ch-3-matter-and-minerals-2/

The anatomic structure that provides a passageway for the female egg cell into the uterus is called the:

uterine, or fallopian, tube More test answers on https://studyhippo.com/exploring-medical-terminology-chapter-8-2/

Identify the major anatomic structures involved in velopharyngeal movement

Hard palate, premaxilla, soft palate, uvula, legator tensor palati, posterior pharyngeal wall, lateral pharyngeal wall More test answers on https://studyhippo.com/cleft-lip-and-palate-2/

Atomic Structure is made up of…

Subatomic particles known as Protons, neutrons and electrons More test answers on https://studyhippo.com/gcse-chemistry-atoms-and-the-atomic-structure/

2. Parkinson disease is the result of decreased levels of dopamine in the brain. However, these patients can’t take dopamine in drug form because the drug cannot reach the brain. What anatomic structure (at the cellular level and up) prevents the drug from reaching the brain? How could these same anatomic structures be beneficial to an individual under different circumstances?

The Nervous tissue is protected from the general circulation by the blood-brain barrier, which strictly regulates what substances can enter the interstitial fluid of the brain. The blood-brain barrier keeps the neurons in the brain from being exposed to drugs, waste products in the blood, and variations in levels of normal substances that could adversely affect brain function. The capillary endothelial cells, astrocyte perivascular feet and continuous basement membrane of the BBB are all significant barriers.The perivascular feet of astrocytes cover, wrap around, and completely envelop capillaries in the brain. Tight junctions between adjacent endothelial cells reduce capillary permeability and prevent materials from diffusing across the capillary wall. The astrocytes act as “gatekeepers” that permit materials to pass to the neurons after leaving the capillaries. The perivascular feet and the brain capillaries are the cellular structures that strictly controls what enters the nervous tissue and are less “leaky” then other cappilaries in the body. Even so, the barrier is not absolute. Usually only lipidsoluble (dissolvable in fat) compounds, such as nicotine, alcohol, and some anesthetics (very beneficial for people in critical condition and needs surgery), can diffuse across the endothelial plasma membranes and into the interstitial fluid of the CNS to reach the brain neurons. The blood-brain barrier is markedly reduced or missing in three distinct locations in the CNS: the choroid plexus, the hypothalamus, and the pineal gland. The reasons for this are that the capillaries of the choroid plexus must be permeable to produce CSF, while the hypothalamus and pineal gland produce some hormones that must have ready access to the bloodstream. More test answers on https://studyhippo.com/essay-questions-exam-3-30741/

The movement of anatomic structures to produce speech sounds. the totality of motor processes involved in the planning and execution of speech

articulation More test answers on https://studyhippo.com/phonology-test-1/

Atomic Structure of Carbon

Atomic Number = 6, Protons = 6, Electrons = 6, Atomic Weight = 12.0. Electrons in first energy level = 2; second energy level = 4. More test answers on https://studyhippo.com/organic-chemistry-3/

What is located in the atomic structure of the nucleus?

Protons and neutrons More test answers on https://studyhippo.com/matter-atomic-structure-wavelength-energy-etc/

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Atomic Structure Flashcards, test questions and answers

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What is Atomic Structure?

Atomic structure is the arrangement of particles that make up atoms. Atoms are made up of protons, neutrons and electrons. These particles have a very small mass compared to the atom as a whole, but they interact with each other in ways that determine the structure and properties of an atom. Protons and neutrons form the nucleus of an atom, which has a positive electric charge due to its protons. Electrons orbit around the nucleus in shells or energy levels, each having its own energy level or orbital radius. The number of electrons in each shell is determined by quantum numbers; these indicate how much energy the electron can possess and how it interacts with other particles.Protons have a positive charge while neutrons are neutral particles with no charge at all. Electrons have negative charges, but their total number must equal that of protons in order for an atom to be electrically neutral overall. The arrangement of electrons around an atomic nucleus defines what type of element it is; different elements have different numbers of protons and therefore different numbers of electrons orbiting around them (although some elements may share similar structures).Atoms can form bonds with other atoms when their outermost shells contain vacant slots for additional electrons; this happens when two atoms want to fill out their outermost shells so that they become more stable (this is also known as electron-sharing or covalent bonding). This process leads to molecules being formed from many individual atoms bound together into one unit (e.g., water molecules consist out of two hydrogen atoms bound to one oxygen atom). Understanding atomic structure helps us understand why certain materials behave differently than others; by studying the various arrangements within an atom, we can learn why certain substances conduct electricity better than others, or why some substances dissolve better than others in water (or any other solvent), etc. Atomic structure also helps us understand chemical reactions much betterby looking at how different elements interact with each other through electron-sharing processes we can figure out which products will result from specific reactions, allowing us to predict outcomes before performing experiments on them.