Answer the following question given this paragraph: The sum of the calculated atomic radii of sodium and chlorine atoms is 253 pm. The sodium cation is significantly smaller than a neutral sodium atom (102 versus 154 pm), due to the loss of the single electron in the 3s orbital. Conversely, the chloride ion is much larger than a neutral chlorine atom (181 versus 99 pm), because the added electron results in greatly increased electronelectron repulsions within the filled n = 3 principal shell. Thus, transferring an electron from sodium to chlorine decreases the radius of sodium by about 50%, but causes the radius of chlorine to almost double. The net effect is that the distance between a sodium ion and a chloride ion in NaCl is greaterthan the sum of the atomic radii of the neutral atoms. Q: Transferring what from sodium to chlorine decreases the radius of sodium by about 50%? Choices: - quark - proton - neutron - electron A:
electron
Answer the following question given this paragraph: Lighter alkanes wash away protective skin oils; heavier alkanes form a protective layer. Q: How do heavy alkanes affect the skin? Choices: - they do not affect the skin - damage the skin - color the skin - form a protective layer A:
form a protective layer
Q: Answer the following question given this paragraph: The winds of a tornado can reach very high speeds. The faster the winds blow, the greater the damage they cause. Wind speed and damage are used to classify tornadoes. Table below shows how. Q: What is used to classify tornadoes? Choices: - seismograph - damage, snowfall - humidity, rain - wind speed, damage A:
A: wind speed, damage
Question: Answer the following question given this paragraph: What do you think when you look at your skin in the mirror? Do you think about covering it with makeup, adding a tattoo, or maybe a body piercing? Or do you think about the fact that the skin belongs to one of the body's most essential and dynamic systems: the integumentary system? The integumentary system refers to the skin and its accessory structures, and it is responsible for much more than simply lending to your outward appearance. In the adult human body, the skin makes up about 16 percent of body weight and covers an area of 1.5 to 2 m2. In fact, the skin and accessory structures are the largest organ system in the human body. As such, the skin protects your inner organs and it is in need of daily care and protection to maintain its health. This chapter will introduce the structure and functions of the integumentary system, as well as some of the diseases, disorders, and injuries that can affect this system. Q: Which system refers to the skin and its accessory structures? Choices: - digestive system - malpighian system - tomoxia system - integumentary system A:
Answer: integumentary system
*Question*
Answer the following question given this paragraph: The water droplets of fog form from water vapor in the air. Fog disappears when the water droplets change back to water vapor. These changes are examples of changes of state. A change of state occurs whenever matter changes from one state to another. Common states of matter on Earth are solid, liquid, and gas. Matter may change back and forth between any two of these states. Q: Fog disappears when the water droplets change back to what? Choices: - cold vapor - ice vapor - solid vapor - water vapor A:
**Answer**
water vapor
(Q).
Answer the following question given this paragraph: Q: What part of a plant protects the plant cell, maintains its shape, and prevents excessive uptake of water? Choices: - chloroplasm - stem - root - wall A:
(A).
wall