Why does Group 1 have the largest atomic radius? Explanation: Every time we move down the group, the number of electron shells of the element increases by one. E.g. sodium has 3 electron shells, potassium has 4, rubidium has 5. Since the number of electron shells increase, the atom is getting larger and thus the […]
Can science explain a rainbow?
Can science explain a rainbow? A rainbow is caused by sunlight and atmospheric conditions. Light enters a water droplet, slowing down and bending as it goes from air to denser water. The light reflects off the inside of the droplet, separating into its component wavelengths–or colors. When light exits the droplet, it makes a rainbow. […]
Which process is responsible for gas exchange in the lungs?
Which process is responsible for gas exchange in the lungs? External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs. Internal respiration is the exchange of gases with the internal environment, and occurs in the tissues. The actual exchange of gases occurs due to simple diffusion. […]
What is the reactants and products of photosynthesis?
What is the reactants and products of photosynthesis? Photosynthesis requires sunlight, carbon dioxide, and water as starting reactants (Figure 5.5). After the process is complete, photosynthesis releases oxygen and produces carbohydrate molecules, most commonly glucose. These sugar molecules contain the energy that living things need to survive. What are the 3 reactants for photosynthesis What […]
Which element is classified as a metalloid?
Which element is classified as a metalloid? The six commonly recognised metalloids are boron, silicon, germanium, arsenic, antimony, and tellurium. Five elements are less frequently so classified: carbon, aluminium, selenium, polonium, and astatine. Is Si a Semimetal? 1 Answer. Silicon is a metalloid, also called a semimetal, which means it has properties of both metals […]
What is the meaning of normal distribution in statistics?
What is the meaning of normal distribution in statistics? A normal distribution is the proper term for a probability bell curve. In a normal distribution the mean is zero and the standard deviation is 1. It has zero skew and a kurtosis of 3. Normal distributions are symmetrical, but not all symmetrical distributions are normal. […]
How many germs are in a sneeze?
How many germs are in a sneeze? Their research found that the average sneeze or cough can send around 100,000 contagious germs into the air at speeds up to 100 miles per hour. Those germs carry viruses, such influenza, respiratory syncytial virus (RSV), and adenoviruses, which cause the common cold. How fast does a sneeze […]
What is a Class 5 filling?
What are the advantages of the heliocentric model?
What are the advantages of the heliocentric model? 5. One of the advantages of the heliocentric theory which could have been understood and known by Copernicus’ contemporaries was its ability to explain the variations in brightness of planets (such as Mars), and the phases of the inner planets (Mercury and especially Venus). Why was Martin […]