Answer:
All elements in the same A group will have the same number of
valence electrons.
Explanation:
Group A has 1 valence electrons.
red blood cells that make antibodies
chlorophyll that carries oxygen in the blood
DNA that control starch digestion in the blood
pH of the blood have to be balanced always. Otherwise it will cause disorders in metabolic activities. Enzymes in our body are working at their optimum pH, if the blood pH is imbalanced, it will affect the functions of enzymes.
pH is the measure of H+ ion concentration in a solution. It measures how much acidic or basic the solution is. A pH of 7 implies the solution is neutral and pH greater than 7 is alkaline or basic and less than 7 is acidic solutions.
Mathematically pH is the negative logarithm of H+ ion concentration. Thus as the H+ concentration is higher higher will be the acidity of the solution.
Human blood have a normal pH of 7.35 - 7.45. This level of pH is maintained by the carbonate ions in blood. Any imbalance if occur in blood pH it will affect the metabolic activities.
Enzymes are bio-catalysts in our body and they are having an optimum pH and temperature to function. Therefore, an irregularity in pH of blood will affect the function of enzymes which clot blood. Thus option a is correct.
To find more about pH, refer the link below:
#SPJ2
Answer:
enzymes that clot blood
Explanation:
This is because enzymes are pH sensitive so sudden changes in pH levels make the enzymes non-functional. Therefore, here the enzymes that clot blood will fail if the pH of blood changes due to failure of regulation.
Non-examples of deposition, weathering, and erosion are the geological processes in which earthen substances or materials are broken down or transported by natural forces like gravity, wind, rainwater, and air.
Non-examples of deposition, weathering, and erosion are:
Therefore, some of the non-examples of the geological processes are wind, air, and gravity.
To know more about non-examples, refer to the following link:
2) What advantages do bottles made from plastic have?
3) What disadvantages are there when you use plastic bottles?
4) Why are plastic bowls not used for heating on a cooker?
5) What are the disadvantages of using metal for a toy for a baby?
6) Why is plastic often used for children's toys?
7) What properties would you look for in materials to make a kite?
Answer:
1a) Chemical inertness
1b) transparency
2) extremely less brittle
3) they can melt very easily under moderate heat.
4) they have low melting point
5) metals are hard, meaning they can easily injure a baby. Metals are good absorbers and radiators of heat.
6) they are less hard when compared to metals so they are less probable to cause injuries to kids.
7) material with very low density.
The specific of gravity is 0.16
Hope this helps :)
Answer:
he is right it is 0.16
Explanation:
Answer:
The radioactive dating method is one of the efficiently used methods in order to calculate the age of the rocks, meteorites, fossils and various other objects, depending upon the rate at which radioactive isotopes decay. In this method, an unstable element changes into a stable one, releasing some amount of radiation and losing a certain amount of energy.
This is efficient in determining the age of the earth. The earth is comprised of rocks that are present from the time of its formation. These rocks can be dated using this method and the approximate age of the rock is evaluated.
The Uranium-Lead dating (²³⁸U-²⁰⁶Pb) method was used to date the smaller zircon crystals of Australia that are about 4.4 billion years old. The half-life of U-238 is approximately 4.5 billion years, which shows that these are one of the oldest rocks on earth and helps in understanding how old the earth is.
Half-life is defined as the time required by a radioactive isotope to decay half of its atoms.
So the radioactive dating method is one of the common method gives the approximate age of the earth.
Answer:
So, we rely on radiometric dating to calculate their ages. Radiometric dating, or radioactive dating as it is sometimes called, is a method used to date rocks and other objects based on the known decay rate of radioactive isotopes.
Explanation:
radiometric dating is a very accurate way to date the Earth.We know it is accurate because radiometric dating is based on the radioactive decay of unstable isotopes. When an unstable Uranium (U) isotope decays, it turns into an isotope of the element Lead (Pb).