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What did Dalton's experiments show?
Dalton's experiments showed that elements combine in definite proportions to form compounds, supporting the idea of atomic theory. He also proposed that atoms of different elements have different masses, and that chemical reactions involve the rearrangement of atoms.
Which two bones are in the forearm?
The ulna and the radius are the two bones in the forearm. Latin: Ulnaris et. radialis. If you hold your arm at your side with the palm forward ulna is palpable on the medial (inside) part of the forearm, whilst the radius is palpable on lateral (outside) side. In layman terms, the radius is on the side of your thumb, and the ulna on the side of the pinky-finger.
What is the difference between flexion and extension in terms of movement in the human body?
Flexion is the bending of a joint, decreasing the angle between two body parts. Extension is the straightening of a joint, increasing the angle between two body parts.
What's the difference between flexion and extension in terms of movement in the human body?
Flexion is the bending of a joint, decreasing the angle between two body parts. Extension is the straightening of a joint, increasing the angle between two body parts.
In biology which term includes the other four atoms molecules electrons elements and protons?
Molecules Atoms which are elements make up molecules. Protons and electrons make up atoms.
What is the element that is largest MG CI S NA?
Among the elements magnesium (Mg), chlorine (Cl), sulfur (S), and sodium (Na), sodium (Na) is the largest in terms of atomic radius. Atomic size generally increases down a group in the periodic table and decreases across a period. Sodium, being in Group 1 and having a lower atomic number than chlorine, has a larger atomic radius. Thus, Na is the largest of the elements listed.
What elements is the smallest Ca Mg Be Sr?
Among the elements listed—calcium (Ca), magnesium (Mg), beryllium (Be), and strontium (Sr)—beryllium (Be) is the smallest in terms of atomic size. This is because beryllium is higher up in the periodic table, with fewer electron shells compared to the other elements, resulting in a smaller atomic radius.
What do forces have to do with atomic radius of alkali metals?
Forces have an indirect impact on the atomic radius of alkali metals. As you move down a group of alkali metals in the periodic table, the atomic radius typically increases due to increased electron shells. The forces between the electrons and nucleus (electrostatic forces) contribute to the overall size of the atom in terms of atomic radius.
Rank these elements in terms of increasing atomic radius?
In terms of atomic radius, the sequence would be oxygen, carbon (both period 2), magnesium (period 3), rubidium (period 4), and cesium (period 5). Note that order by periods is not absolute: in each period, the elements toward the far left side have the largest radii. For example, the radius for lithium in period 2 is larger than almost all of the elements in periods 3 and 4. *Numerically, the elements O, C, Mg, Rb, and Cs have respective radii of about 60, 70, 150, 235, and 260 picometers.
How are elements identified in terms of their atoms?
Elements are identified based on the number of protons in their atoms, which is known as the atomic number. Each element has a unique atomic number, allowing scientists to distinguish between different elements.
What is the largest alkaline earth metal Atom?
Barium is the largest alkaline earth metal atom in terms of atomic radius.
What are the three pairs of elements that are out of order in the periodic table in terms of their atomic masses. Why it is necessary to invert their order in the table?
The three pairs of elements that are out of order in terms of their atomic masses are iodine and tellurium, cobalt and nickel, and uranium and neptunium. It is necessary to invert their order in the table to maintain the order of increasing atomic masses within each group or period, ensuring that elements with consecutive atomic numbers also have consecutive atomic masses.
What are terms refer to the periodic table?
Group: a vertical column Period: an horizontal row
Does the atomic radius increase as you go from left to right because principal energy levels are added?
It is not possible to give a sensible answer to this question because, in terms of the Periodic Table, the atomic radius DECREASES as you go from left to right! So the given reason would act in opposition to reality.
Is a sodium atom is larger than a silicon atom?
No, a silicon atom is larger than a sodium atom. This is because silicon has more electrons and protons than sodium, leading to a larger atomic radius.
Which is smallest Be Mg Sr Ca?
Among the elements Be (beryllium), Mg (magnesium), Sr (strontium), and Ca (calcium), beryllium (Be) is the smallest in terms of atomic size. This is because atomic size increases down a group in the periodic table due to the addition of electron shells. Since beryllium is at the top of Group 2, it has the least number of electron shells and therefore a smaller atomic radius compared to magnesium, calcium, and strontium.
What would the size of an atom be described in?
The size of an atom is typically described in terms of its atomic radius, which is the distance from the nucleus to the outermost electron cloud. This radius is usually on the order of 0.1 nanometers (1 Ångstrom) for most atoms.
