Answer: water and other small molecules
Explanation: the walls of the glomerulus is semipermeable permitting only the passage of water and other small molecules like, mineral salts, amino acids, glucose, urea. Large molecules like plasma protein, Platelets does not pass through the membrane.
Answer:
- <em>The substance that cannot be broken down by a chemical change is </em><u>tungsten (option C)</u>
Explanation:
Chemical compounds are pure <em>substances</em> constituted by two or more different elements. They have fixed composition and have their unique chemical properties, different from their individual components (elements) and from other compounds.
Thus chemical compounds can<em> be broken down by a chemical change</em> into their individual atoms or other simpler compounds.
The substances indicated by the choices <em>A) methane, B) propanal, and D) water</em>, are chemical compounds with chemical formulae CH₄, C₃H₆O, and H₂O, respectively, so they<em> can be broken down into their consitutents by a chemical change</em>.
On the other hand, <em>tungsten</em> is one of the 118 known elements. Its atomic number is 74, and its chemical symbol is W.
Then, being tungsten an element, which means that all the atoms present in a pure sample have the same number of protons and electrons, it <em>cannot be broken down by a chemical change</em>. The only way to split an atom of tungsten is by a nuclear reaction.
Answer: b. One atom transferring electrons to another atom
Explanation: An ionic bond is formed when an element completely transfers its valence electron to another element. The element which donates the electron is known as electropositive element and the element which accepts the electrons is known as electronegative element. This bond is formed between a metal and an non-metal.
Covalent bonds are formed by sharing of electrons between non metals
For example, In calcium iodide the one electron from calcium metal gets transferred to iodine atom and thus form an ionic bond to give
Electronic configuration of calcium:
Calcium atom will lose two electron to gain noble gas configuration and form calcium cation with +2 charge.
Electronic configuration of iodine:
Iodine atom will gain one electron to gain noble gas configuration and form iodide ion with -1 charge.
Answer:
Each colour has a purpose. Black is generally used for insulating wires. Other colours are known as 'phasing tapes'. These colours indicate the voltage level and phase of the wire.
Explanation: