Ques:Answer the following question given this paragraph: Electronegativity Differences between Metals and Nonmetals An element's electronegativity provides us with a single value that we can use to characterize the chemistry of an element. Elements with a high electronegativity ( 2.2 in Figure 7.15 "Pauling Electronegativity Values of the ") have very negative affinities and large ionization potentials, so they are generally nonmetals and electrical insulators that tend to gain electrons in chemical reactions (i. , they are oxidants). In contrast, elements with a low electronegativity ( 1.8) have electron affinities that have either positive or small negative values and small ionization potentials, so they are generally metals and good electrical conductors that tend to lose their valence electrons in chemical reactions (i. , they are reductants). In between the metals and nonmetals, along the heavy diagonal line running from B to At in Figure 1.24 "The Periodic Table Showing the Elements in Order of Increasing ", is a group of elements with intermediate electronegativities ( ~ 2.0). These are the semimetals, elements that have some of the chemical properties of both nonmetals and metals. The distinction between metals and nonmetals is. Q: What are metals and good electrical conductors that tend to lose their valence electrons in chemical reactions called? Choices: - stable metals - conservants - precious metals - reductants A:

Ans:reductants
-----
Ques:Answer the following question given this paragraph: Electronic components consist of semiconductors, which are solid crystals consisting mainly of silicon. There are two types of semiconductors, called n-type and p-type. Q: What are the two types of semiconductors? Choices: - n-type and m-type - o-type and p-type - a-type and b-type - n-type and p-type A:

Ans:n-type and p-type
-----
Ques:Answer the following question given this paragraph: Rayleigh scattering occurs when light interacts with our atmosphere. The shorter the wavelength of light, the more strongly it is disturbed by collisions with atmospheric molecules. So blue light from the Sun is preferentially scattered by these collisions into our line of sight. This is why the sky appears blue. Q: What occurs when light interacts with our atmosphere? Choices: - prism effect - eclipse - rainbow formation - rayleigh scattering A:

Ans:rayleigh scattering
-----
Ques:Answer the following question given this paragraph: All living things are able to maintain a constant internal environment through homeostasis. Q: What process enables all living things to maintain a constant internal environment? Choices: - peristalsis - consciousness - ketosis - homeostasis A:

Ans:
homeostasis
-----